You could sell the AITD to a note buyer who will pay off the underlying at closing - BUT the buyer will need to purchase the wrap for at least the amount of the underlying.

  #1 is most of the new communities don't sell to investors. 

Your ability to identify properties and markets where you can generate equity (both imputed and appreciated) while using debt responsibly and knowing when is most appropriate to sell is how you acquire more real estate. 

Little bit of pistachio to bring down that selling price?

Most decent lots are selling in the $50k to $60k range. 

They are more useful IMO for getting chunks of equity right off the bat thru value add and then either realizing that equity by flipping it and using for a down payment on something bigger or hold a couple years and then sell at that point to do that then. 

These properties include different foreclosures and those that sell below their market value.

Are there any strategies to sell subject to,s to end buyers?

The profits that I make from selling the primary property, will be used to pay off my primary residence 

I would consider selling one of the properties, paying off the debt, creating a reserve for your remaining investment, and ensuring you are 100% financially stable before you invest again.