With all this hopefully beneficial advice from everyone (especially W.V. with his detailed suggestions), who needs a vet - right?

.... Just kidding, vets do serve a purpose - sometimes/often.
Seriously, Jacob's problem is an excellent example/case showing what everyone needs to know or should know (IMO) to assist their birds in the future - especially when one is living in a remote location or when one cannot afford a vet or cannot find a vet who will accept payments.
In addition to the herbs, supplements, oils, juices, plant extracts, etc. that have been suggested to use in a case like this, best for each of us I think (who does not want to simply or only rely on a usually expensive avian vet) to get a birdie medicine chest ready asap - as one never knows just when these problems/conditions/ailments will surface. Also good to know this stuff for this additional reason: vets are humans too and sometimes do make mistakes and mis-diagnose, aren't available at times, do not return calls in a timely fashion sometimes, give the wrong doses sometimes, etc. - labs also make mistakes. Always best to also have a second opinion from another avian vet and/or someone experienced in the field, even if they do not have DVM next to their name.
I feel that with caring, helpful, bird keepers like we have here on this board, who seem to always be available when you need them (one or more at almost any hr. of any day) most members can truly help their flock members recover from many of the more common afflictions without always needing professional intervention - just as many of us humans can recover from our human ailments without running to a doctor every time we ourselves do not feel good.
Suggestions for all who want to increase the odds of having a healthy flock and for all who want to be able to tend to their birds, at home, where the birds feel the most comfortable:
Prevention is of course the key but when treatment is needed, best IME to have the following on hand - supplies, knowledge & contacts.
For prevention:
(1) Healthy, natural as possible diet.
(2) Ability to exercise naturally = full flight
(3) Natural direct sunshine, daily if possible
(4) Best quality F.S. Lighting (best specs available IMO)
(5) Fresh air to breathe (try to eliminate household fumes/contaminants)
(6) Stress free as possible environment
(7) Clean cages/flights/aviaries
(8) Natural amount of daily sleep required (12 hrs. the books say)
(9) Proper humidity and adequate water to bathe in
(10) Use of proper quarantine procedures when introducing a new flock member to your home/aviary
(11) Proper cleaning of one's human body/clothes & proper cleaning of new toys or cages or etc. (if not sealed air tight) when brought home or coming home from a bird show or pet shop or vet's office etc.
(12) Purchase food in air tight containers/bags from the manufacturer, not from food bins in pet shops
(13) ........ ETC. - (to be added to this list later)
For treatment:
(1) Keep an adequately stocked birdie medicine chest (Injectible Baytril; Nystatin; Metacam; Diflucan (fluconazole); other prescription meds if one can afford them and get them; ACV; Aloe; LRS Solution (electrolytes); handfeeding formula; syringes; eye droppers; gavage instruments; brooder/hospital tank or enclosure; probiotics; the usual bandages, ointments, O.T.C. stuff; Etc. ..........
(2) Learn asap how to give IM injections (Intra-muscular); Sub-Q injections, etc........
(3) Learn asap to crop feed and crop medicate as well as evacuate a crop (the latter most likely will need to be done at the vet's office since this is a much more delicate procedure than just crop feeding or medicating -easier/safer to do on baby birds vs adults or fully weaned birds). Crop feeding/medicating IS NOT rocket science - usually all that is needed is a proper sterile instruments, positive attitude, a somewhat steady hand, knowledge of how to hold the bird and how to stretch the neck (usually an assistant is needed).
(4) Have local contacts ready to assist if needed. Make friends/associations with local parrot/bird breeders and local bird pet shop owners/managers/employees who are qualified to help if you need it. Many who are in the field who truly love birds (not just in the field for profit) would be willing to assist if called upon in an emergency. Of course, in return for their assistance, give these people your business when purchasing supplies for your flock members and even volunteer to help out in their shops/aviaries to learn and pay back. Refer other local bird owners/keepers to their businesses.
(5) Purchase a few books on proper bird keeping to include books on the species you keep and a couple in general avian medical books.
Note: I hope no one minds my posting this advice in this thread or in any future threads of similar nature. This post may qualify as a "Sticky" but some members do not always read all stickies or look for stickies before asking questions in a time of need. Therefore, making sure this advice is read (more than once), everytime a similar problem arises, will undoubtedly be of benefit to a bird and the keeper in need and eventually put into practice - hopefully sooner than later. JMO.
FOR CLARIFICATION/EMPHASIS: Please do not take anything I said above as meaning that you should not take your birds to qualified avian vets when you sense something is wrong. Birds are very good at hiding their problems when they are not feeling well and by the time they start to exhibit symptoms of illness, their condition is probably pretty advanced. When in doubt, call the a.v. ... All I am saying is that when I notice their droppings are off, appetites have changed or a bird is simply not acting quite right, I can usually head off more serious problems by intervening immediately with some things I have here at home. I realize that not everyone is comfortable with doing this and by all means, if you are not, then for the sake of the bird, call your vet.
Everything I have suggested above is from 15+ yrs. of personal first hand experience. I do not know it all (far from it), I am still learning daily as we all are. Hope some of what I have learned will be of assistance to some of you.