What is the best way to go about our next investment financially?

[Lorraine Martin]

We have a property paid off with about 300,000 equity in our investment property. Single Family Home. 

Should we do anything with the equity in that house and borrow against it to buy another investment property? If so, what kind of loan should we take? Most loan officers don't do HELOCS on investment properties... I will say we have a HELOC on this house right now for 85,000 and it is being used on nothing. So I do plan to use this first as a down payment if we find a investment. This line of credit ends in 4 years though.

We also have our primary residence paid off and that is a double wide though. Any approach we should use with this property to buy a future home? 

Or just get a regular conventional loan with 20% down payment. (we have cash that we can do this)