Based on that you have two completely different approaches, if it is a former it really comes down simply to income you and your partners have and a 25% down payment (assuming you are not going to live there) for a conventional agency loan (FNMA/Freddie) and you will have to put it in your names as no mortgage banker will finance an LLC/LP (there are ways to get around it after you buy it in your name and transfer into an LLC without triggering a due on sale clause but that is a different conversation).If you are talking about a multifamily loan, you can get a down payment for as low as 15% for certain product types (like FHA multifamily) but you would need a loan amount of about $2 million for most lenders.

If you are looking out of state as well as local, you should seek out an agency that is licensed in many states. 

He also has a home health care agency that he runs out of this building and the business has generated a million dollars last year.

I usually use Kingsburg Insurance Agency based out of Fresno County and they always give me great service.

The buyer's agent we are working with has been fantastic, and has a 'go to' closing agency he's had great experiences with -- but their calendar was fully booked during our closing window. 

Now I look bad because it was an agency that I gave my attorney.

I get your points, but being also a RE broker (Torrey  and Associates is my Agency Business) I’ve seen all aspects of subleasing.  

If so what would be the benefit of going with the seller finance option as opposed to an agency loan all other factors equal?

Architect - Needs specific experience with storage unitsFinancing options - bridge loan, agency loan, etcGeneral Contractor - Experience with building storage unitsIf you would like to jump on a call with me for 30 minutes and ask me anything pertaining to real estate I charge 100 for half an hour.

If I have to put my rental on the MLS, I go with the flat fee agency since I do everything myself.