Reason I wouldn't ask for the appraisal price is the competition of other houses on that street are all around that price and I am just undercutting and selling to a friend to make a guaranteed quick profit. scenario (B): Now the other option I was considering was keeping the house and renting it.

If so, you are 100% guaranteed that centre wall is load bearing.    

At best I would would go with section 8 that guaranteed most of your rent and sometimes 100% of rent.

It sounds like to me that one party made the loan and another party provided a guarantee for the loan. 

No telling when a web page was last updated and they don't give legal advice on the internet!

I believe they guarantee it, as well.

If the tenant moved the furniture into the garage then they still need to guarantee the condition of the furniture. 

While a Quit Claim Deed can convey interest in the property there's no guarantee of marketable title with them, express or implied.

You are guaranteeing them a part of the "value"  at the time of the future sale of your house.

There are different ploys used to try and hide such transactions, none of them guarantee it can't be discovered in an audit and mortgages are audited at different times by lenders and/or servicers.