Consider accepting the tenants if they pass your screen, deny the dog, require a certified clean bedbug report for their current home and belongings and a separate bedbug deposit to cover future treatment if needed.

What would be an acceptable number for a Buyer to enter into a deal... 

This happens every day, there's lots of marketing activity to say no to revenue, and oddly prior to anyone bringing it up you're screaming from the hilltops that Spark doesn't accept this money - well time will tell.

We are intelligent humans on this site and we have the ability to look at the people that submit a rental application, evaluate their situation and apply a reasonable decision regarding whether or not they are an an acceptable risk client.

I will counter them back and tell them I accept "US"  currency or they are free to sell their cryptocurrency and then use that money as a down-payment.Thanks again!

While the seller does not have to accept this, chances are they might. 

We discussed this, but weren't sure if that would be acceptable to the title company. 

Do not proceed if you can't accept reality and constructive criticism.You are acting like a bum, and I say that with kindness! 

They also sell add-ons that allow you to accept cards instead of coins, but I don't know what machines they fit on. 

a lot of people want to shop on Zillow, look at 3 properties in person, and have their 1st offer be accepted.