Stay away from ferals. On the off chance they can even produce quality colors you will likely end up with runts or mutants. They likely come with diseases and defects. You would only be increasing the odds of malformed foals popping out and having to do some horrible shit. The only result is mental trauma on yourself and the fluffies involved.
Hit up the shelter. Invest into a quality dam with good colors, preferably already pregnant. Don’t aim too high, something with colors vaguely pleasing to braindead children will do. The real expenses will be feeding the family. Save some actual money, maybe 100-125 for just feeding the mother. Let her raise the foals until they are weaned then sell.
Keep them completely isolated to the house except for several hours of play time outside once the foals are capable of moving around properly. So long as you’re always home and not working an actual job put real time and effort into the family. Be there. Just be in the room, sat there and cuddling at least one while encouraging positive behaviors. Really put your soul into it. Encourage good behavior in the mother, like not picking favorites and teaching her own foals to use the litterbox.
If she produces amazing colors sell her once the foals are weaned. As in sell her to a professional breeder after a few litters. Keep some of her foals until adulthood and use them to breed more competent litters. You will have kept her this long too. Now that preferably two of her mares are adults too buy a stud from the local shelter, sell the mother to recoup losses. If she produces horrible colors bite the bullet and get a job at Wendy’s since you can’t fail your parents any worse doing that.
EDIT: Alright assuming this formula has worked. Move the whole thing outside. Save $500 and spend it on ordering two decently cheap chicken coops off Amazon. That’ll leave maybe $100-150 for buying chicken wire and some wood posts. Don’t need anything particularly amazing. You can probably cheap out for $50 in chicken wire and $5 in zipties. Or go all out for $100 in good wire and wire ties or whatever.
Use all this to build two closed in small patches of yard for the fluffies to enjoy. Mares and foals in one coop, stallions and pubescents in the other. Ideally this’ll only take up maybe half of the backyard. Enjoy having your room back. Spend maybe $50 on cheap but plentiful toys. No need for beds if you pad the floor of the coops.
The next part is purely psychological. For your own sanity as well as the mare’s, do not let them call you daddy or mommy. You are not their owner. You’re the nice mister or nice lady that finds the good babbies homes. You’ve devoted your life to this job, devote hours every day to impressing upon your mares and their foals that when a weaned foal leaves it is getting the best possible life. A name, a home, a mommy or daddy human, etc.
But be vigilant. You don’t want them to attribute punishment or failure to not getting sold out of your operation. This will only breed negative personality traits into the foals you sell and the mothers you keep. As the money comes in distract them with better and better toys. Meanwhile tell them if they stay that too is a reward. It’s a win win. Good babies go to good families. Good mares get to become mummahs and see their good babies go to good families. Spend every conversation pounding this reality into their thick little skulls until they start comforting each other with it.
Last step. Don’t go homeless.
EDIT EDIT: Since you spend all your time at home you might as well also spend all your time with your fluffies. Talk to them. Comfort them. Do a good job of seeding good lessons into the dams and you’ll start getting good natured and well trained foals. Hell put a litterbox into the coops and change them daily. That’ll train them for that.
If you really are too damn bored by dealing with fluffies get a handheld console or find a compromise. Game on the living room television if it gives you easy sight of your fluffies. If your room is by the back yard keep your bedroom window open and speaker volume low at all times so you can monitor the fluffies for disturbances.
if you live in a state with a lot of flight based predators then place wire coverings on the outdoor pins. Fluffies can see the sky and not be eaten. If the fluffies realize they’re pinned in tell them the wires love fluffies but hate monsters, so the wire is protecting the families.
Newbie breeders focus on shitting out good colored foals. Don’t be stupid and buy into the prejudice. Sell quality foals, not foals with quality colors. Mark your business with good natured and pretrained foals and people will remember it. After all, you can’t sell a socially retarded alicorn. We all learned that lesson the hard way.