My main goal is to identify an opportunity that can be scaled from a couple of spots to a dozen, to several dozen eventually without the need to completely re-design or re-engineer the layout without respect to providing utilities. 

I will keep you updated as I go further into this project.Gratefully,Jay O. the units you are talking about are way too big, the layouts way too big, etc.

Assuming the 2 acres is 100% usable, I'd like to do buildings on one acre and outdoor RV/boat storage on the other acre.I've looked online at several companies that build storage buildings, but I don't know what size to ask for quotes on.Does anyone have software recommendations that can assist in planning and designing the layout of the facility?

I am on my second house hack and to be honest, the first one was a much better deal and makes more sense on paper BUT I got exactly what I wanted in terms of spacing, layout, and location for the second so it checked off a different set of boxes. 

Consider the layout of the duplex and whether reconfiguring one of the rooms into an additional bedroom would significantly increase rental income.

I did lay out a general approach to asset protection in one of my more recent articles, so feel free to refer to that.

What's the layout of the other houses is the  neighborhood.  

If you could see an optimal layout, then perhaps you could pick and buy your own furniture if you knew the inventory needed. 

There are some extra costs in there for added mgmt, cleaning, supplies, utilities but it's still outperforming year lease numbers.Our other property on Jersey St has very funky layouts... there are 4x3/2s. 

This layout has been perfect for us because the rental unit will likely be 1-2 people so not a lot of tenants and most likely a young couple.