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

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.

Today I was approached by someone who is offering me around $1800-1900/month to rent the property from me to run a short term / medium term rental out of it, primarily for traveling nurses or other business people.

They are probably including the roof in the price of the solar panels, and they make it enticing by offering installment plans.

It's a 4 bed 1 bath and I'm open to either renting it or selling it (if I'm offered a price around the ARV).

NICE GUY" and if necessary, you can and will take different routes. maybe offer $50 gift card for the inconvenience and keep things in good term but you should stay firm and sound more entitled. 

Builders will also offer rate buy-downs for investors lowering the monthly expenses.

They also offer a "Mobile Home University Boot Camp" that will provide you a wealth of information. 

Title companies often have a business development person that goes after real estate investors, offering foreclosure lists as an incentive.