That costs is about free at the library and no extra charge to be DIY landlord on your next rental!

It has low price appreciation because there have been pro-builder friendly policies in the suburbs and vast swaths of flat, easy to build on land. 

I find the idea of having a small number of fully paid off, high cash flowing properties vastly more appealing than having a lot of highly leveraged properties that cash flow a little each.

The vast majority don't go.

A thread like this will invite some person to give a boiler plate response like "Your property management should make you more money" (which they're probably parroting from some podcast they just listened to).There are a minority of stellar property managers, but the vast majority are either 'meh' or major sources of incompetence and liability. 

Great deal:  duplex, well rehabbed, long term tenants, excellent cashflow, 5 min from proposed site for Obama presidential library and tiger woods golf course.

The vast majority will not try or there will be no money to recover and landlords will have to eat the loss.   

(I got the book from my library at no cost)All the best!

If you're new to REI I'd recommend educating yourself as much as possible, for free, through websites like this, podcast, your local library, and meetups.

Something you may want to consider, although the tiny home movement is directed toward inexpensive life style the vast majority of "tiny people" place a high level of importance on appearance and quality of finish.