Unfortunately, such a funding option is not generally available for commercial properties, unless your LLC or Corp that is the borrower has other "unencumbered" assets that can be leveraged to generate the funds you need.

How did the price compare to other options?

We want to know the best TRUST option, We have 3 rental units in North Carolina and each one of the units is on their own LLC.

There are a lot of investment options.  

It’s more about offering a different option for owners who need capital, and offering investors to access the world of real estate investing fast and smart, like never before. 

Even in HCOL areas, adding an ADU typically does not make sense because developing a single small unit is the most expensive residential development that exists.Adding an ADU is a lot of work (probably more than a brrrr but with worse return), has poor financing options, typically adds less value than the cost of the addition, and detracts something from the primary structure even if it is just yard and privacy.Good luck 

However, I am unfamiliar with any lenders having traditional mortgage options for anything with a VIN number such as a trailer.

I've been doing some light reading, and it sounds like refinancing that property and using the proceeds to reinvest elsewhere might be a better option. 

Also Cocktails and Real Estate at Patriots place.BP does have a local meetup section which usually has good local options.

Another option that is more passive would be to invest in a syndication as an LP.