The landlord should be named on the tenant's insurance policy for additional protection and to assist with tracking compliance.

Additionally, I would like to attempt to do the process Owner/Builder with subcontracting work out as well as doing some of the work I'm comfortable with (I have some experience with bathroom & kitchen remodeling an am not new to the construction industry).

Quote from @Zara Massoud: Hi, The PM company we signed on has a clause to add them as 'additional insured'.

I am considering building up on my fourplex. 2 additional units.

If you sell a property, and do a 1031 exchange with the proceeds, but don't need all the proceeds for the down payment of the next property, are you taxed on the additional profit that isn't part of the exchange?

My goal is to leverage that equity for additional income.

Neals learning experience.

Purchase and rehab properties will have a similar reduction, but as long as you have experience within the US, you should still be able to get some pretty good terms.

Your primary strategy should be to have the Contractor and all Subcontractors add you to their insurance policy as Additional Insured. 

In addition, they "found" the AC needed to be serviced for an additional $400.