It's just not worth it for a minor thing.If it's bad, you CAN replace floor grout w/ the sanded silicone too, but again, if it's bad you probably need to do some rethinking underneath the tile.

But remember that there are a lot of fundamentals to learn underneath the harder stuff and while the big rehabs are the things that will ultimately get you to the bigger profits, you'll never see those profits if you dive in too fast.

Depending on span, what's underneath that floor to take up the new point loads, and whether the new beam is below the ceiling or above in a pocket.Does not include rerouting HVAC/plumbing/electrical, etc. nor fixing the flooring.

I also put a vapor barrier $.54/sf underneath for softening and slight insulation. 

After that step, I would install a subfloor with textured plastic underneath to prevent against a minor water intrusion and go with whatever flooring you want. 

It is missing floors, like you can see the ground underneath.

I wouldn’t have an issue with a simple building transaction but this one involves 2 residential properties, a variance,  and soil removal.

Regarding repairs, be sure to check everything including the floors, air conditioning and heating unit, plumbing (look underneath all sinks and run every faucet), and the condition of the siding outside.

I literally lived right underneath it! 

Are there any soil concerns?