There are certainly issues including how many and what types of properties you can sell with these methods and to whom, but most of those are consumer protection issues.  

Turnkey is only a method of buying, not of owning.

Hello @Shaun PalmerI just use standard MLS Purchase and Sale Agrements (PSAs) that title co's are used to.A standard addendum called (here) a Method of Payment Addendum is pre-printed and just needs you to put in the amount down, term and rate.  

At the Knoxville Real Estate Investors Association - KnoxREIA .com - one of our members recently increased their first appraisal by more than $35K by using this method of record keeping.

I've used all of the methods above on remodels to get power. 

This is a composite of all of their conversations: Since you're wholesaling with the intention to move to the buy and hold method, it wouldn't benefit you to work as an agent.  

If not, what do you think about my method of thinking with this situation?  

So far, the subject-to method sounds interesting to me.... or any other method that does not require a lot of money down.I start a 3 day class tomorrow=D I'm also really impressed at the resources on this site. 

I am going to do every free advertising method I can to make the phone ring.

You should use neither tool's valuation methods (zestimate or redfin estimate), and should be coming up with your own based on the comps you found by making adjustments like @Hem Kumar said until you are comparing apples to apples.Cheers!