I believe Ken Rishel has some materials but I've not seen them, he is into compliance training, he's creditable.

@Steven W.Here are some of the main items to include on the promissory note.After you have drawn up the note or if the borrower has composed it, review the note to make sure it conforms to your Solo 401k requirements and is in compliance with the regulations.Confirm that the lender is your Solo 401k (it should read as follows, for example: Smith Do Solo 401k Trust)Sign all documents as trustee of your Solo 401kMake investment using funds from your Solo 401k checking accountWhen note payments commence, deposit all payments to your Solo 401k checking account (therefore, all payments need to be made payable to your Solo 401k)

You will want to be in compliance.

Contact their previous landlords to see if they had issues with late pays, lease compliance concerns, or any other issues.Lastly, you can make them compete.

You can also run in to FDA compliance issues depending on the product.

Also the city is requesting changes to the building design because of zoning compliance. 

You can get the code violation list from the city Code Compliance or Code Enforcement department.

I state I will check in with confirmed guests as their travel dates approach to confirm we are in compliance with any restrictions in place. 

Compliance issues are not just to the letter of they law as there are many gray areasThat's where I'd start....

Cash payments requests are also big red flag that this guy may not be in full compliance with L&I either.