Rust advice?

My old buddy up in Chicago did a frame re-built, him and his son. He said it took him $3.5k just to fix the rusty issues.
Well, if you buy a used frame for 1500 and make a swap, you may be able to spend more wisely to the more important upgrade underneath while you are at it. It may be a wash at the end, but you have more upgrades than just patches.