@Paul McCormick Jr, I thought the same thing as to the flexibility of the owner financing.

I would start calling smaller banks and credit unions that may be portfolio lenders as they may be more flexible 

Flexibility is also key.  

I have flexibility on timing (sort of) but wish to act as quickly as possible. 

Engelo was very flexible on the terms to purchase the property.Mid-September my non-recourse loans closed and was able to close on my new / rehabbed dublex the first week of October.

Hey @Christopher Stover--You're in a tough place for this, but it's not out of the question if you're willing to be a little flexible and patient. 

@Luke Badalaty, only if the existing sprinkler heads are the flexible ones ( like below ). most sprinkler heads are hard piped, which means you would have to shut down the system, drain it, open up the ceiling to extend the pipe and then close it all up.

I prefer the relationship and flexibility of community banks even though their terms are not always as good.

I agree with @Bryan Otteson  this totally depends on the flexibility that your Job offers.  

The Solo 401k will provide the most flexibility for a variety of reasons, including the ability to borrow funds from the plan.