Plus maybe you do a 1031 exchange 3 in to 1, save all the taxes and reduce the number of loans by 2.

I had no idea how to take an action on this, and the property eventually sold.  

You aren't saving or making money. 

I don't think there is any amount of savings that could justify the cost of a total tear down and rebuild.

If it keeps my vacancy numbers down, then the money I am putting aside for vacancy can go to the extra cost a professional might charge to fix the tenants mistakes.Just for reference, my tenants are staying on average about 5 years and I still save for vacancy between 2-4 weeks per year.

Not a bad idea if the numbers make sense.

Oftentimes, we would work closely with CPA to make sure how our borrower's taxes can be filed that would save them from paying taxes, but also making sure they can qualify in a lender's perspective.You would want to make sure your first few deals has an acceptable of return in order to lower your DTI and expand your investment portfolio in Real Estate.

Cameras are a bad idea, and ignoring the breach of privacy issue, it will likely lead to you micromanaging the tenant. 

https://www.cbsnews.com/news/real-estate-cheaper-to-buy-than...Does this imply that house hacking in San Diego is a poor idea?  

Once you get as many details as you can on the squatters feel free to PM me for ideas on how to get rid of them.