I had always operated in a manner fully compliant with current direction, have clear disclosure, conversations and written defined contracts with buyers detailing exactly what comissions would be and how they'd work out, etc etc. 

The tenant didn't work out, but I at least had some success.

How did this work out for anyone that tried them ?!

Things will work out. 

I did it a few times and it didn't work out.. cost to build these days including prefab homes are not cheap.. you need to compare the median price per sqft in the area you plan on doing it..It may work if you purchase a prefab shell and get some sweat equity to finish it off..

Also, love to work out as much as I can in things like running, bicycle, jumping rope, and lifting weights-no ripped or jacked by any means-but thinking in the long term benefit (like in real estate).

@Nicholas Pisano real estate investing is a long-term game, not overnight.Have seen many newbies jump in a buy several properties, then when things don't go according to their unrealistic plans, freak out and sell at a loss.A past client is doing that right now - they bought 5 properties from a high-pressure agent, hired us, micro-managed us to try to meet their unrealistic expectations, terminated us and hire another PMC to "save" their portfolio and went that didn't work out, are now selling 3 at a loss. 

You can try it if the electric costs don't work out. 

And honestly I'm kinda worried about how it all goes due to my current lack of knowledge, but I'll do my best to make it work out no matter what.

First, you may not like being a landlord, so figure out what you want to do if being a landlord doesn’t work out.