I would say aside from whatever competition there might be, one of the difficulties is buying at a discount in a strong seller's market. 

@Marcus Holloway I understand what you are trying to do, but in my experience anyone taking advantage of early payment discount, would have payed full amount on time anyways.

@Jodie Fae As long as your buyer is being honest about the lender approval and not using this as a way to get a discount on the deal the I would work with him and see if there is a middle ground.

I presented them straight forward deals with a 795 FICO, many deals experience, and they couldn't close a few simple refinances and a straight forward huge equity purchase.

I would be straight forward with the tenant and let him know what is going to happen and at what date and time.

Keep in mind that the seller has to be getting a discount on his next property greater than the $30k discount he's taking to sell this property. 

Over the life of a rehab loan, the property value does not go straight up. 

Do I do it as a BRRRR in which case I am not sure what to do with a good tenant or just a straight rental?

Sorry, but I'm not getting a discount anywhere on my purchases.

Although i don't do bandit signs anymore (against city ordinance), i now do multiple different strategies to find discounted properties.