Ok,I am on disability myself and get a tiny amount of food assistance. My advice, watch Craigslist and FB Marketplace for old chain link dog kennels. Sometimes people have them for almost nothing. Then get basic chicken wire to start with and put across the top with a tarp over it. As you can get the hardware cloth and wrap the chainlink run with it.
That is exactly what I did and have slowly gotten it better predator proof over the last couple years. I have now moved it all up against a storage shed and made it better. The first picture below is how it started,the second is last winter, and the last is my pallet coop I made.
I also used wood pallets to build my chicken coop. They were free, only thing it cost me was the time, energy, and screws to build it.
I have 4 chickens, and I buy 50# of layer feed for $18 and it lasts 2 to 3 months, I also feel them veggie scraps...and I get 2-3 eggs a day.