Fortunately I am very happy in my new place (and they are happy with me) and my next home will be one I am purchasing. 

Are you looking to purchase this new subject property or renovate? 

I'm looking to refinance my existing investment property to purchase one in Pittsburgh for the purpose of short term rental am crazy to do it in the current market situation with Airbnb being what it is ? 

At the time of purchase we were more than financially capable of paying the mortgage and we have been paying the mortgage.

Think of it like going to a car dealer to purchase a new vehicle.

Also realize that the taxes on the unit that you are basing your purchase on - are the current owner's taxes.  

Is this for a purchase or refinance?

Keeping the structure the same for the purchase and the refinance is not a problem from a lending perspective unless one of you will actually hurt the qualifications of the loan. 4.

You will likely want to use Hard Money for the purchase loan. 

It's never a bad idea to use your earnings from crypto to purchase real estate with though.