There are at least a couple factors at play.  

Experienced managers can help evaluate potential investments by providing insights on rental demand, market rents, tenant preferences, and location-specific factors that affect leasing success.For example, rental properties need to be close to conveniences like major roads, shopping, and schools.

Short answer: Yes, laundromats can be profitable, but profitability depends on a few factors.

Yes, I use Zillow reporting as a start and look at other factors.

How do you factor that unknown future expense into the ROI?  

The biggest factor is thoroughly review their credit score report especially on time payment record and score.

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

Those are some factors that will determine your returns.

Other most common factor: Family Size increases due to marriage or having a child. 

What factors lead to this decision?