I've got about $525K in equity in the property, but lenders have told me that I cannot get a HELOC to access that equity for additional purchases because the duplex was financed as an investment - they have said TX law dictates that HELOC can only be used on primary residences.

Account ClosedAdding your property manager as "additional insured" is standard practice and beneficial for you.

In my basements tenants have access to they totally disregard the access required and block the pathways needed for access.

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).

My goal is to leverage that equity for additional income.

Is there a way to access the additional features without creating a new Stessa account through the BiggerPockets link? 

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

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

For example he is trying to place a bookcase door to access a small amount of storage from the bathroom.  

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?