I’ve personally just closed on my 4th in 3 years and even just the two I bought last year have netted me a starting engineer salary 👀!  

Then there are some in between that may have a composting outhouse and a hose spigot, but no full electricity etc.  

I got an address for it, cleared some land and hooked up electric.

An electric dryer will run up the bill of that unit quickly , where a washing machine wont nearly as much . 

Now I am in the early stages of development.I am working with a consulting firm to help with a concept plan, engineering, and to get the city to sign off on everything.

I went to a public hearing on a red card that the town fabricated because a structural inspector decided to do an electrical inspection early.

Doing DIY on plumbing, electrical, or structural.

Based on the value of a property you can likely get away with a inexpensive desk top study such as condos and you will require a more comprehensive engineering study for larger properties like a 4plex.Desktop / modeling options are sometimes good for smaller residential like you mention. 

I have the land and am working through the process with the civil engineers and the city.

Electric services.