Your competitive advantage or the competitive advantage you want to develop (money, time, experience, skills, etc.) should be the guiding light to tell you where to invest. 

Over-capitalizing early can kill otherwise solid developments. 

Knowing the market would be better to help gauge, but is the main city expanding, pushing into and past this area, how much new development is going on to increase local prices?

Over the next 5 years Detroit will become a major international destination due to the joint planning and development effort between Metro Detroit and Ontario Canada.

There are nice new home developments up by Fletcher and Elgin.

I would however suggest that you develop metrics so that you can measure markets against your metrics i.e..

Private lenders, JV partners, or small funds will look more at the deal structure and projected absorption rate.Build-to-rent or temporary cashflow is tough with raw land.Most developers accept that horizontal development doesn’t cashflow until lots sell.

I also remember different developments were "FHA" approved. 

If rates dip below 6.25%, expect a significant refinance boom and origination volumes increasing by 8–13% year-over-year.Washington Policy and Regulatory ShiftsPolicy developments in Washington will play a critical role in shaping the mortgage landscape this year.

I believe that those who see a lot of appraisals related to ADUs already knew this, but ADU developers in particular avoid this or give misleading data.