I’m alive guys.. but how much would you pay per month?

I’m in a bind and want out of my adoptive mothers house I just want my own space with my kids.. anyways I’ve tried to find an apartment but no luck and cowboy has a mobile home on his uncles property that they offered to fix and allow my kids and I to live there on the property in the mobile home bare with me okay.. I asked how much to pay per month if I was to do that and Cowboy said nothing it’s for free well I can’t allow that I have to pay something if I did do that but I don’t know what to pay it’s a 4 bedroom 2 bathroom mobile home it used to be his uncles