Not quite sure what you are asking but - unlike used cars - I am unaware of any prohibition of how many houses you can live in and sell at a profit.

For those who might be reading this and don't know, the proposal would prohibit owners from operating more than one Airbnb/VRBO/short-term rental on a property.

Charanjit,it is possible in some circumstances to co-invest personally with your IRA but since you are considered "disqualified person" to your IRA such transaction might be prohibited.

Do they charge prohibitively high rates?

Zoning generally prohibits legal grows in residential areas (aside from personal use).  

(b) Seller shall also pay an amount not to exceed $X,XXX.XX to be applied in the following order: Buyer’s Expenses which Buyer is prohibited from paying by FHA, VA, Texas Veterans Land Board or other governmental loan programs, and then to other Buyer’s Expenses as allowed by the lender. 

As such, it would be prohibited for you to live in the IRA owned property even if you paid market rent. 

The "no parties" clause prohibits parties that spill out into the common areas and/or cause a disturbance for other guests. 

We would be happy to provide you with an inspection for your investment property, please visit the website for our contact information (forum rules prohibit posting it here) 

OBJECTIONS: Buyer may object in writing to defects, exceptions, or encumbrances to title: disclosed on the survey other than items 6A(1) through (7) above; disclosed in the Commitment other than items 6A(1) through (8) above; or which prohibit the following use or activity: .