Sorry, that I can't be of help to you, but I have to be honest and say that you haven't even scratched the surface yet, I sent 2 years looking at a variety of RV types and models before I settled on one, & it was more than twice the price your talking about.
I have to agree with some of the others & say that you need to give up on a class B or a small C right now, with 3 of you I wouldn't go with less than a 29-30 ft.
With a class c, you will need a toad, either on a dolly or flat towed, the higher the mpg the better, you can get a TT far cheaper, but then you need a pickup, with either a club cab or crew cab, and with a weight distributing hitch & all the other little goodies you will need, you be back to looking at some real money.
I'm not trying to discourage you, but you'll be ripping out a lot more of your hair. You sir are far more daring & courageous than I.
GOOD LUCK