The interworkings of Appfolio are pretty interesting with how complex it is and all the things you can accomplish. 

I read an article I thought articulated this very well, we are seeing the collapse of a very complex system and this the fruit.  

There are some rare and complex circumstances where I see this would be beneficial.

Expect a custom ADU to take 9–18 months, with 3–6 months for design and permitting and 6–12 months for construction, depending on complexity and contractor availability, and the speed of processing permits.

Also no real issues with our 5 arbitrages in an apartment complex.

Residential subdivisions, while potentially less complex, can be hit-or-miss depending on local housing trends and the cost of infrastructure development. 

I also advertise before someone moves out to get a new tenant before the current one leaves. 100% occupancy on a LTR is very common for me.No idea on a MTR.100% occupancy sounds great, but for a bigger portfolio or apartment complex, it usually means you're leaving money on the table.Here’s an extreme example: I could rent out 100 units at $500 a month and make $50,000.

.- I live in Raleigh, 10-50 unit complexes will be hard to come by unless you're okay paying a premium.

Here’s MY general feeling; if a MHP isn’t TOH, or I can’t easily switch from POH to TOH, then I might as well purchase an apartment complex and have less problems.

Over the past decade I have invested as an LP in about 50 apartment complexes.