Your "Core 4"(Realtor, Property manager, Contractor, Lender) are all critical to your success. 

Study the markets you are targeting and find investors/agents/property managers in those areas to network with.

We are in the process of building a property management company, does anybody have a simple Property Management Agreement you can share with me? 

I also have managed warehouses and considering purchasing a warehouse or storage facility so if lending also differs for that, could you please let me know?

I don't know your market, but that's been the headline here in Reno.Make sure you're working with a realtor that has their own investments in the town you moving to, preferably has their property management license too.  

We manage about 15% of our portfolio as Section 8 tenants.  

This bodes well for your management of them as tenants.

A wholesaler has a property that requires $30,000 cost of entry.

Taxes are almost always the largest selling expense you'll face and can very quickly kill your investment's efficiency if you don't manage them intentionally. 

I have a single family home that I've been trying to find a Property Management company to work with and I can't believe how difficult it has been.