1. CAP =750k
2. Income=649k
3. replacement=600k
4, Comp=400k
avg =599k, now depends on location, it can varies +-15%.
on 70LTV, your loan be about 419k
now, that report will list all the repairs require to bring to current code, along with an estimate, I am pretty sure the bank with withhold that portion in escrow, till all repairs are done.
so you have to think about its worth it or not. I know cost of repair be done for about 65% of the estimate, unless something needs professional certificates.