These listings aren't always advertised, so it's important that you check Craigslist regularly as well as drive through neighborhoods with For Sale signs.

Drive by literally any construction project and look to see if there isn't a giant sign outside advertising who's doing the work. 

He is usually booked out for months and does zero advertising - all word of mouth.

I have no idea what the cost would be now with labor and materials as high as they are.

Nit sure if they could command the same rents as a srick or manufactured.Manufactured have about all the same benefits of traditional stick built but are generally faster to build and slightly cheaper.Stick built- most expensive but made from common materials, easier to appraise, but take longer to construct. 

Now, inflation and scarcity of materials is making even that a difficult play. 

@Wes Singleton - that is a good point, however on the development side of things you're looking at highly fluctuating (increasing) material costs as well as challenges on timing due to labor shortages. 

We didn't shy from this and actually advertised it. 

How much will you set aside for capex, vacancies, advertising, etc? 

It does state the minimum term, and the tenant is responsible for all costs (rent, utilities, advertising, transportation costs to show the property) until either it is rented OR the lease is up.