Consider highlighting any special features to stand out, and maybe even offer a move-in discount to attract tenants quickly.

Walk the property and talk with the tenants. 

Order something from every bar, order something from every restaurant, make the waitresses work for you, tour the place- the restrooms- the kitchens- the back of the house and walk the entire outside of the building. 

I find that selling owner user commercial property with 20% down and owner financing the balance is quite easy and usually results in at least a few quick offers.  

Even with a turnkey, I'd recommend doing your due diligence, getting a full inspection and sewer line scope and if possible physically walking the property yourself if OOS. 

Can anybody offer insight for which things to be mindful of as part of our due diligence before purchase?

Under this method you make your one and only offer; no negotiation, if it’s not accepted you walk away.When I started in real estate investing a couple of hundred years ago, I was a proponent of the first method.  

Keep in mind that no agent can win you a deal if your going below asking price and they have several offers at or above ask.

Then offer him a deal for $1500yr to keep it green instead a tractor storage facility.

In the industry this is most commonly known as a "Fix and Flip" Loan.We are correspondents with dozens of lenders who offer this type of loan.Most commonly, the loan will cap out at 75% of the ARV (But Investors do need cash, this is not a 100% financed transaction)75% has to include the purchase price and the rahab amount requested.The terms can vary greatly.The two most important areas that will impact the terms the most is 1.