I am a first time buyer, bought a property last year and will hopefully start building this year.

Rehabbed entire property inside and out for 140k.

If not I wouldn't bother selling as there is an incredible amount of money lost in buying and selling properties, so you have to make sure you have a plan to maximize the equity and actually have enough. 

I wanted to get a feel of how many Landlords/Property Managers make prospective tenants fill out a pre-screening app prior to viewing the rental property.

When's the last time you bought a Detroit property?

I have one property my wife owns, and soon we will have two.

I just did a cash out refi in order to move my 1st property from my name to my LLC another cash out refi on the same property wouldn't be over kill?

Personally, I would focus more on the long-term cash flow of the property rather than worry about your parents living standard.

Then management of the property.

Are there any Lenders this offer Line of Credit for investment property?