Issues arise during construction, many of which are minor in nature but those with local knowledge and expertise are better positioned to understand this keep your projects moving towards the finish line. 

UDFI typically arises when debt is used to acquire or improve income-producing property, and the proportion of income related to the debt can be subject to UBIT.

Most leases you can purchase are generic in nature and do not equip you with very helpful tools to manage your property in the most effective and efficient manner, lowering costs, reducing liabilities, creating revenue centers, etc. 

Everything is dark and the curtains aren’t even open to let in natural light.  

Links to your three other posts on this same topic so readers can see what's already been discussed:https://www.biggerpockets.com/forums/61/topics/551577-backyard-homes-produced-in-chinahttps://www.biggerpockets.com/forums/617/topics/551580-china-built-backyard-homes-socalhttps://www.biggerpockets.com/forums/61/topics/537480-tiny-homes-produced-in-chinaThis sort of house is an interest of mine, though I'm more interested in building them on-site with a 3D printer and local materials.  

This would make decision making hard, on top of likely needing owners to sign mortgage guarantees, etc.Not enough involvement/too many owners, that you no longer satisfy SECs rules for involvement and it is really a security that needs registered or exempted.Some middle ground, like DSTs or these other fractional ownership, where the admin work is so intensive that fees need to be higher to make it worthwhile for the operator.Then again, I am drawn to real estate, so by nature drawn to traditional, proven structures.  

Unfortunately, human nature is such that if I do spend hours, days, months vetting a sponsor, and ultimately sign off on them, I will already be biased to accepting the next deal they offer, regardless of whether it is good or not.  

This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return. 5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space. 6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties.

A smooth sea never produced a skilled sailor (Franklin D.

Consumer mindset, they've never been business owners with a producers mindset.