(3 convention units +  3 ADUs) * 3 lots = 18 unitsIn general adding one ADU is not a good investment because there is no more expensive residential development than a single, small unit.  

Unless you've done substantial improvements to the building or used a large down payment when buying, it's unlikely this will work.Perhaps your best move is to find a new primary residence that is 2-4 units and repeat the process.

I have my eye on a large single-family residence in Bethlehem, PA, but I have yet to acquire financing.

This money gets added onto the back of the loan kind of like a VA funding fee does. 

Keep in mind, adding "cute", and upgrading things won't increase your rent or ARV past what the market in that area will tell you is the max. 

I'll assume the best of Jason's response as lumping Loanbidz in with large, impersonal lenders.

He told me he owned a few mobile home parks in town (they were large and had high lot fees) and this is what sparked my curiosity.

A client of mine in Maryland added smart home features to their rentals and boosted rents by 12% with minimal investment.

Self-managing from out of state has been doable, but the challenges have added up, and I’ve realized I’ve missed things that could have been avoided with closer oversight.If you’re just starting and don’t already have a strong local network, I’d advise against self-management from out of state.

Not impressed with other large institutional managers who are very light with boots on the ground and in many ways have the attidude they are assisting you in managing the property, not managing it for you.