Most places require 30-90 days' notice of rent increases and you can't increase the rent if they have annual leases until those are done.you say rents are $200-300 below market value, but not what the actual rent is. 

Well, three top reasons come to mind:It will allow you to deduct their earnings on your own tax return.It is required by law for any person to whom you paid at least $600 in 2021, total.

Also keep in mind that your rental unit must go through an inspection prior to approval (and will require a yearly inspection). 

What are the requirements in California for an RV parked in a private property converted to a permanent residential structure?

@Brady Tome the awesome part of using a VA loan is not requiring a down payment to purchase the property.

It seems like the Special Warranty deed would be preferred, but are we required to designate a transaction figure?

There seasoning periods but 12-18 month as a requirement is odd. 

These actions are not uniform across states, and neither are the barment requirements. 

Keep in mind what's required and maybe talk to a CPA on how to properly get it tax-advantaged in the long run.Sorry I can't be of more help, but I'm sure you can get things started and the experts in your area could bring you to the closing table!

Should I make the tenant sign an additional document that spells out she is responsible for her occupant, that they are required to follow all rules otherwise she may be subject to fines, etc?