@Jason Staine I used my local credit union where I also have personal and business accounts. 

We have excellent credit.

DSCR loans are based off of down payment, credit score and either actual or market rents so it helps to supercharge an investor's real estate goals and net worth.

Would you run a credit report on the buyer?

Run a credit/screening report on yourself.

Tying up a desperate and in arrears homeowner with a purchase contract you can not perform on and in which a sale will happen ONLY if you are successful flipping the property for a higher price can cause extensive damage to the homeowners finances, credit and personal life.  

If you switch later, that is another set of problems.When entering a transaction is easy, but trying to balance, analysis reports is a challenge - Now is the time you need to take an accounting course - learn debits and credits and more.Pick and choose wisely.

This is a very broad question but to give a general answer, the reason why they exist is to finance properties that won't fit the typical bank credit box.

.- Our credit scores are both >800.My hubby and I have many family members and friends in other states who invest in rental properties.  

I just started applying for lending and have excellent credit with zero debt so it shouldn't be a problem.