Hi Anna,What are your current rents per month off of each property currently versus the value of the property?? 

Tenants tend to be a bit more high maintenance when it comes to plumbing issues versus homeowners.

Notice that this is the other end of the size spectrum versus the 5 bed/ 4 bathroom unit the original string is about.   

I am trying to determine hard money versus private lender.

- What would lenders say to manufactured homes, versus spec built?

I wish I had known about the site when I started investing versus getting to it only last year. 

You are at an impasse :) I have the same problem of forest versus trees.

When you make this mental shift then you will see a drastic change in the thought process.If it turns out to be not as hard then you feel great versus expecting it to be easy and have a huge let down when it turns out not to be that way.I transact commercial real estate and I love it with also being an investor myself.

Look at your finances and see if you have the ability to buy versus rent. 

I also think there is enough awareness these days to have a small, but growing, clientele for such accommodations.I wanted to reach out to see if there are any developers here on Bigger Pockets who are already building Passivhaus SFRs or MFRs and to learn about the construction approaches you are taking (built in-place versus modular or panel (SIPs)); the build premium to arrive a the Passivhaus standard (in parts of Europe, the premium appears to be 10-15% on MFH properties ... with an 80+% reduction in energy/resource operating costs, the payback is very quick); and whether you are finding buyers or renters willing to pay a premium for the efficiency.