We discussed asking for an additional appraisal with the buyer, but the buyer wanted a guarantee that we would close for the newly appraised amount so we let the deal go.  

She'd probably have to get a new loan in that scenario however obviously in order to get you off the current loan unless the loan is assumable, but that's the downside of linking your finances on a 30 year contract without being married. 

I'm in no way affiliated with this company but here's a link that may come in use should you need any additional forms in the future @Morgan McRaehttps://www.firsttuesday.us/in...

It was easy to update and we would send a link with automations to all new guests.  

I do recommend trying them out though as you did and seeing what you like about them to make the best decision. 25% off link for Hospitable  - Click here

I guarantee my screening is better.2.

No bank is going to give you a loan on an LLC officer guarantee if/when the LLC has no assets.

We will be investing through a US corporation and all partners (and there are many) are foreign nationals so we cannot give any personal guarantee or collateral.

Costly and time consuming with no guarantee of success.

Going to guess that they have a solid contract, that you signed, that states they make no guarantees or warranties about the referrals they give.