@Jim K. sees the positives in things.

Either you haven't been completely transparent here, or you need to learn a bit more about how to improve your credit to put yourself in a better buying position.

It drives my returns up as they are constantly adding value to my capital rather than tying it up in a stabilized property...and I don't have to do any of the hard work sourcing and re-positioning the next one.

At that point your friend is paid in full and the new lender has a lien in first position. 

It anchors them to a certain position and they reference offers based on that number instead of the reality of the sale, to everyone's detriment most of the time.

I have been learning all I can and hope to position myself to be a resource for others as I learn more and take on new challenges myself.

I'm not exactly positive how that marriage would occur, but maybe there is a way for you to exchange work in order to gain some valuable knowledge all while making great contact(s).

Sell it and invest in something that will produce positive cash flow.

Sure, my monthly cash flow will appear to increase by $220/mo, which could increase my purchasing power (a strong positive), but I'm not sure if it's a wise investment. 

The 8 mobile homes are on lease-to-own contracts with the existing tenants, and the homes were positioned to the tenants as effectively being their homes; if all goes well, the tenants will make all required payment for 10-15 year periods, and will gain title to the homes at the end.