I screwed up!! Advice please?

No offense taken at all. I don’t have the time right now. Too much going on with work, the kids, the house needs a new roof before winter etc. etc.
The seller seems really honest, but maybe he’s a really good liar! I try to always see the good in people, and even now, I kind of believe that he was unaware of the issues.
It definitely does need new rails, I’m just not sure if it’s worth having them done. I don’t have the time, and I don’t trust my welding skills. So I guess I’ll do a little digging around on what it might cost. And make a decision from there.

You really need to dig into the rest of the car to make that decision I think. It could be that's all it needs. However, if the frame rails are rusted badly, I seriously doubt that's all there is.