What’s the most cost-effective way to completely remove the cigarette odor from the property?

By keeping in LLC's does that not effect my personal credit and financing capabilities?  

You want to find that out as well, because if you can reduce expenses effectively, obviously you've increased your NOI. 

An interesting little weekend read for all you sticks and bricks folk out there...https://www.atlasobscura.com/places/thomas-edisons...Edison was ahead of his time in many ways with fireproof, insect-proof, and easy to clean affordable housing but clearly it didn't work out.

I spend a lot of time arguing, listening to crying and cleaning up messes.

You could have her "quit claim" it over to you but that isn't a clean way to do it.

Do it again to create a snowball effect?

Or say 12/1 which is after I have finished moving/cleaning/advertising and got a tenant signed? 

All things being equal which project is more cost effective?

It wouldn't generate cash; it'd be a consumable good, effectively.