The first build I did was taking an old ESP neck and putting a FF board on it. http://www.sevenstring.org/forum/sevenstring-guitars/217716-my-very-first-build.html
You can do it, but it takes some work. Check out the overhang on the body. Had to put a big ol' cutaway on it but it came out nicely...
If you go to fretfind2d and use the rough dimensions from the RG8, you can print off a template to stick on your RG and start planning this!
Thanks for the advice, I've already started on getting what I need to get this thing in shape. As for low income, I'm living off what I make from my band (not hard because I live with parents), which is next to none considering I have to drive a few hours to get to my shows.
I have to work on a no income budget but as long as it doesn't cost me over $500 I think it's do-able. I'll look up the prices for these things. Thanks for the advice, I totally forgot that I could just make this one bearable rather than buying a new guitar.