owner financing question

[Katharine Chartrand]

I have an $190K investment property with a 4% mortgage with a 140K balance.

My realtor recommends selling it as owner financed.  The stock is low for owner financed properties. 

 A deal that would make sense for me would be one where i get 

some % down, ideally 20%

monthly payments that cover my mortgage costs for some period 

the buyer has the right to buy the house any time during that period for it's current market price minus whatever principle they have paid down.

but i don't want to hand over the deed to the buyer until i get paid in full.

and there needs to be some time limit, like 3 years, for them to take over the property.

Is this a standard deal and, if so, what is it called.

My realtor is calling it a wrap mortgage, but from reading the site it seems like I would deed the property to the buyer immediately with wrap mortgage.  I will not do that until they have paid for the house in full.  I am not interested in just having lien on a property I have deeded to someone else.