I want to know what happens with vacancy rate and what happens if the market declines or new roofs have to be installed or repaving a parking lot or redoing side sewers.In my opinion, this will take someone with experience hours to graph out.It might be a "dyno-mite" deal, it might be more headaches that I want to put up with.

I'm also a CPA and love the accounting aspects of real estate, probably more than the real estate investing itself!

If you are looking to make some money and have a place to use 4-5 times a year, then from that aspect it's a great investment but solely looking at numbers I could find others that perform much better.  

On a new build $275k is the sweet spot but if you go up to like $320 it better have a steep roof 9ft ceilings and curb appeal front or it will sit up to 90 days before selling.Its basically what most people can afford around here.

The appealing aspect here is the ongoing population growth and other economic factors.

Depending on how many you go through, heaven help you if you have that, in addition to a major expenditure (i.e HVAC failure, roof) For people with not great cash flow, you wipe out yearly profits every time.

Is there more reading material regarding this aspect ?

Land in michigan is less than in texas , north texas.I will give you examples on cost differences.Material prices are the exact same price if not a little less.texas framing price per sqft $2.00plumbing $9500hvac $9500concrete Labor only $2.00 per sqft  Concrete $180yd 5 sackdrywall $10500Electric $8000Ok here are the michigan prices , better sit down.framing $13.00 sqftplumbing $25,000hvac  $20,000concrete is about the same for materialdrywall $20000electric $25000Both quotes were for a 3/2/2 home with 6/12 roof hipPeople in michigan wonder why houses are so expensive , its because of the sub contractors.The plumber only has about $5000 worth of material to do a whole house but yet there still asking for $25000

This will be one of the smallest ADU additions.However if you are adding it to be used by family/friends then the investment aspect is not as important.  

I'm focused on buy & hold, but open to other aspects as opportunities are found.