The situation is unique in that I don't think the owners could handle a typical real estate transaction for this property.

Is it the listing agent or curbio has the option as well ?

Hey everyone first time posting on here so still new to the page, I’m just very curious on what option I have on getting some lending on homes that I currently own.

Hello Robert, the square footage of the homes we're identifying allows the conversion into a duplex (typically 1,600 ft or greater) and the return on investment is much higher than constructing an ADU.

NACA another OO option.  

I connected with another investor that owns one (MTR) next to mine and they said they do really good you just have to make sure the property looks very nice.Another option could be looking into doing a padsplit. 

Reach out if you want to chat through some of these options. - Have you run the calculations for your monthly cashflow and rents for the area?

You should research STC rating options.

Not sure what help I can provide on other 2 options but I have some contacts in Germany.  

(e) Unaccepted, recorded, irrevocable offers of dedication of the property to the public or a public entity for a public purpose, and recorded options of any taxing agency to purchase the property or any interest therein for a public purpose.