I am very much considering a full frame swap on mine.
Frame is technically repairable, but I will need to have at least 4' rebuilt starting behind the front tabs/shocks...
Got a welder friend and he told me if a customer wanted that done, it would be well over 3k to fix.
I plan on getting a used frame from a junkyard (found 2, one had a front-end crash so I don't think it will be this one) for about 200$
If I prep-repair it and can't do the swap, the local dealership quoted me about 1200$ to do the whole thing, still cheaper than repairing it.
I really wish I can do it, because I won't send it to the dealer to fix.
That's my input on frame rot...