The first I'll tell you involves the family homestead in Peterborough NH, a big 1791 colonial farmhouse up on the hill that's been in the family for almost the entire time, though nobody has actually lived there full time in a few decades.

If the tenant violates the lease in other ways by how the treat the property issue them a notice to correct and if they don't correct the issue you COULD try to evict, BUT I would make sure the issue is VERY VERY clear cut because I have trouble believing a magistrate will allow an eviction for petty things or something that isn't 110% clear to everyone involved. 

Was a licensed engineer involved to design to repairs?

Consider House Hacking 2.0, which involves buying a small multi-family property with an FHA loan (3.5% down) and renting out the units.Good luck!

Key concepts in zoning are the zoning maps, zoning matrix, planned zoning map, special/use variances.  

Understand the fees involved and calculate the total cost for an entire year of management so you can compare the different managers.

This is more of a tax planning matter, so it would involve working through several specific questions to tailor it to your situation.

.- to do a successful brrrr involves a lot of skills.  

What is the risk involved?

If an agent is involved your chances of having a meaningful conversation with the seller is limited.