If you are finding 23% CoC then I would recalculate your numbers just to make sure and if it is still correct, run and jump at that opportunity!

Do you think it will be an issue to get them out after we close (a short closing is probably part of the reason we won the bid), or should we push them to get the renters out before we close and risk losing the deal?

I have purchased via owner financeI have also sold via owner financeYou are 100% correct no need to get a real estate huge waste of your money as you said Get a real estate Atty YOU pay them.

@Vlad K. is generally correct, however he may have missed the fact that you're talking about rentals.

It looks like you would be all  in at 76k, if that is correct, There are a few lenders out there that will do this type of deal. 

Most buyers say “I don’t want to get into a bidding war” when you inform them that it’s a multiple offer situation.

The opening bid was $40,000.

If you are doing the agent thing correctly, you should be talking to at least 30 or more folks per day, previewing 6 to 10 houses, working with buyers, your sellers, other agents, mortgage brokers and appraisers.  

Correcting your misperception does not mean that I am taking the polar opposite view.  

My impression is you were asking for quote bids and shop for a better vendor, that is another story.