Since then the bank/Seller have asked for numerous extensions which we have given. 

I have taken out numerous mortgages in the pass and IF I even locked the rate, I was never charged a fee.

If the answer is that he was just putting it in the bank, I would explain how he could be secured by making the loan to me and collect higher interest on his money.I would also offer him one other tidbit that worked in numerous situations.

There are numerous ways to structure and protect each party.

So that WILL be the best deal around, I reached out to 10 different companies/suppliers.

Realize that anyone who might invest with you will have numerous other places they could invest. 

I'm currently under contract on a smaller, 5-unit commercial office/retail property. 4 of the 5 leases expire in April/May of this year, and one of the contingencies of the sale closing is that 3 of those 4 soon-expiring leases renew for at least one year (I have full negotiating power over those leases).All of those tenants have showed no intention to vacate, and are happy with their current situations.I've seen/read in many places that it is best practice to stagger leases as much as possible in order to avoid the possibility of multiple tenants moving out around the same time, leaving numerous units to be turned over.Would it best for me to try and get 2 of the 4 tenants to renew a two-year lease (which they've done in past) and the other two tenants agree to a one-year or three-year lease (both have been year-to-year in past ).

@Phillip Weickert Phil is great and owns numerous rentals himself.  

This will become more important with numerous LLCs.I know this is a question for a CPA and/or lawyer, but figured that others are likely wondering too.

These are all questions that could lead to numerous different answers.