If I were you, I'd build a profile on all of those sites, and post multiple listings on all of them.
As for AI, just consider it natural language coding with severe memory/context limitations and you've got the gist of it. Since you don't have money to burn on subscriptions or API tokens right now, use this: https://chat.deepseek.com/
For the dogs situation, I would recommend reaching out to petfriendly groups for help, and vetenerians that might do things probono.
https://www.bestiepaws.com/nearby/free-or-low-cost-dog-neute...
https://www.aspca.org/pet-care/general-pet-care/low-cost-spa...
(CA only)
You need to figure out how to rent a room, or even a garage or ADU from someone. It is going to be drastically easier without the dogs. Maybe you can find someone you know who will take the dogs so you can still visit?
You then need to find ANY job. Drive uber for 30 hours a week, study and practice coding/AI skills/resume building for 20 hours a week, etc.
I find it highly unlikely you're going to go from living on the streets to a high paid dev job. Instead, you need to make a realistic three year plan.
You cannot keep your dogs and expect to do this, you tried, it was a noble effort, but you gotta give them up man. It's just too hard to find cheap places to rent. You need a home base to stay healthy enough to sleep, study, and learn the new skills you need.