You can refinance with a loan that uses your personal income and debt to income / DTI ratio or a DSCR loan that will use the rental income to structure the loan. 

Anything structural (adding/taking away walls or square footage)6.

  ( I'm not interested in opinions on LLC ownership or pass through entities and the various tax advantages of those structures - It has to be a C-corp (but thank you anyway)). 

What if the other owner is cheap and doesn't want to touch the parking structure?

Order a boundary survey from a registered surveyor showing the existing house and if you are making changes such as adding to the existing structure you will need to provide the addition and or deck changes on the survey as well.  

The location in Linden, MI, and the property's structure offered an excellent opportunity for a significant value boost through a fix-and-flip strategy.

Some lenders have a flat PPP but most are structured as stepdowns.

I just want to structure it right from the start. 

A tent is not considered a permanent structure whereas a geodesic dome is a stick built home on a foundation.

Best to structure and treat as if a property management company from the start.Think like an institutional lender/servicer.