Well because you can't count sheer dumb luck single deals as "free information helped me". ) then the effectiveness of "free information on YouTube is:(500,000/17,000,000)*100 = 3%Now let me give you some perspective.In the world of mechanical engineering.. let's say electric AC motors, efficiency numbers are around 95%.

This bugs me.

It's about half a square mile of pipes, electrical work, sensors, chemical reaction vessels and towers, storage tanks, etc. 

Insurance may be 1.25-1.5% of the value of the house. taxes are low.On the operating cost side, electricity may cost double what you are used to.Just my thoughts. 

And is electricity really just 20 bucks a month in the Florida summer?  

  $370kThe other property is very old (1920), with orignal electrical, windows and plumbing. 

I caught the bug two weeks ago and have watched about 50 videos lol.  

All electrical work requires a permit.

With the help of the agent we negotiated a list of needed updates to an older apartment building for electrical and plumbing retrofits to keep up with more modern standards.

I don't count on it early on and usually consider feeding it until all the bugs are worked out.