Now if you have name regocnition and want to be a front man that is a different story. . . .  

Unless a different one would be better that you could suggest   If you are house hacking you can utilize 3-10% down. 20%+ is great to put down but not always possible.

What would I need to do to structure the note in order to have a note buyer come in and buy the note or buy a partial enough to pay off the 215k at closing and still have some difference coming to me or the note revert back to me after the partial was paid for. 

Hey John,I work with several different property managers, which I refer to for my clients (I'm an investor friendly agent over here).

I went to 35-40+ different markets a year each year from 2014-2016 to scope out places to lend privately.

How long it takes to be financially ready is different for everyone.

These are very different than Subject-To, as the loan actually transfers to your son's name, and off the seller's name. 

I'd send out 500 at a time, using a different mailer/method weekly.

Also what does the city say is the assessed value of the property on your taxes (it will be different than the appraised value, but should give you an idea).

Would this be something different from what you can Google and find other articles on?