I second the landlord stat by Chicago Temperature control.

I saw the delivered costs were in the ball park of $110 Sqft, stick built is in the $300-$400 range. 

If the seller is making you show your hand first, you could always throw out a low ball all cash offer just to see what they do.

I would also call an atty to get the ball rolling with the PD.

How much $ does the SDIRA/Note management cost monthly or yearly (on average, ball park numbers)? 

Buyers agent realized they dropped they ball by not doing a home inspection prior to settlement.

Ball also sells widemouth half-gallon canning jars that are sadly hard to find and very expensive.

I'm working on two developments right now with utility issues....through the many, many calls and correspondence required to keep moving the ball down the field, I remind myself I'm working with people that may not necessarily be on the same timeline as me.....persistence and patience!

I have never been in this position, but just spit balling here, maybe approach said individuals politely and work out an affordable repayment plan with the again polite caveat that you would not want this to move into a full fledged collection action and you wouldn't want to be forced to not renew their lease.

Put the ball in the seller's court by asking "how do I verify your numbers?".