I think you can make the care a lot easier for you with good large feeders and waterers that don’t need daily cleaning/filling. You should easily be able to find a set up that lasts a week. Same for keeping coops and runs clean - work to make the set up as low maintenance as possible - that’s good for you even when you are not on vacation. Then look for a sitter. 100 birds are not that hard to care for if daily chores are minimal. I would ask around, check with dog and house sitters, high school kids, etc. Should not be impossible at all. Of course you’ll have to pay them well.
I think it is exceedingly hard to make money on chickens and especially when you go about it as haphazardly as you have so far. Serious breeders selling hatching eggs and chicks of rare desirable breeds, yes, but that is a lot of work. Otherwise , no. I don’t think you can make money on started pullets for example. Just think about cost for all the feed, bedding, electricity, that goes into raising chickens. If you give them quality feed and supplements it’ll be very hard to cover even your expenses.
I think it is exceedingly hard to make money on chickens and especially when you go about it as haphazardly as you have so far. Serious breeders selling hatching eggs and chicks of rare desirable breeds, yes, but that is a lot of work. Otherwise , no. I don’t think you can make money on started pullets for example. Just think about cost for all the feed, bedding, electricity, that goes into raising chickens. If you give them quality feed and supplements it’ll be very hard to cover even your expenses.