The contractor seized doing the work and I believe has placed a mechanics lien on the property.

Fire rating, mechanical equipment and materials often change and are more expensive.

I’m doing some research on tax sale in GA, a newbie  question if there is a municipal lien or mechanic lien or other personal liens,  will that be wiped out after foreclosure of redemption ?  

Don't worry about losing.That is likely not the only reason you are losing.We use this language for our clients, "Buyers agree to limit inspection repair requests to major structural, mechanical, plumbing, environmental, and safety issues."

These were for a jewish people that were governed in a Theocratic system where this was the funding mechanism.

You would be putting too much risk on a new area that may or may not work.A 4-unit property has 4 furnaces so you could have 4x the cap ex as a single-family on mechanicals.

It seems to be in good shape, with updated electrical, mechanicals, and roo.

A list is a filtering mechanism, right?

This is because it was poorly converted, improperly done, "patched up" over time, and might have mixed up mechanicals etc.

Overall, I think you'll need a way to pull out a few hundred thousand via what I mentioned above or another mechanism.