I second what
@Mizzely said. When I was a freshman in college, I worked 70 hours a week, and I only had one cat. Most of the time, I had just enough time to come home from school, change clothes, grab my clothes for the next day, and books, and be out the door in a matter of minutes. I was lucky if I saw my cat for two hours a day. I worked as a sitter, which seems easy enough, right? No. My patient was bedridden, was very overweight, had a colostemy bag that I had to tend to regularly, I fixed his food, measured his meds, helped him adjust in the bed because he couldn't move on his own, and I had to find time to study on top of all of this. The worst part is, because of his critical condition, I could NOT sleep at any time. From 6pm to 7am, I was working while trying to balance just my freshman year. I had class from 8am to whatever time my class ended since different classes ended at different times depending on the week and the professor. I didn't have a bird then, I just had a cat, but my absence caused her to misbehave, become aggressive, and start urinating outside of her litter box. I worked like this for several months before I got burnout and ended up in the hospital. There was NO way I could have had a bird with the schedule I had. Even though my family helped feed my cat and keep her company, they also had to work, so it's not easy at all. Four birds? I applaud you for your determination, but realistically, it doesn't always work that way.
Even now, with me being on disability and being home 24/7, I still have to manage my time wisely because I have to go grocery shopping, take my cat and bird to the vet, buy pet food, maintain the house, pay bills, find some 'me time', deal with depression and anxiety, all while ensuring I'm on call for my animals if anything should ever arise. And I just have 2.