Money, time, sales, marketing, and all the other business areas play a part, but when it comes to growing your business, without a system to develop people, you are throwing rocks in a pond and hoping to catch fish.

Then caught up in the run up of 05 and 06 I became less picky and purchased with the idea of making money from fast growing price increases.Then came 2008 and prices in the area where my rentals were dropped like a rock. 

BP rocks

Rock on @Vincent Reid !

I am like a huge rock sitting at the edge of a long hill...

And a big thanks to @Derrick Craig – Rock Star from Memphis!

The panel may still be fuse blocks.2) significant new plumbing:  you quite likely have a mixture of cast iron and galvanized waste lines (though copper is a possibility) and may have galvanized supply lines;3) envelope: the house will likely have no more than R5 insulation mineral batt insulation ... or worse, someone blew in UFFI in the 1970s ... and will not be air sealed;4) Roof: The roof will have been redone - likely 2-3 times ... multiple layers may still be up there ;-)  There is also a good chance the roof is not correctly ventilated as closed soffits were the norm;5) Fenestration - If it has original windows and doors, they will be hugely inefficient (single glazed windows with storms)6) Interior:  Our house was built in 1952 and they still used "Rock Board" with plaster over top on all the interior walls.  7) HVAC:   Please tell me its not the original furnace or boiler;8) Landscaping : How have the grounds and outbuildings been maintained.You could be looking at a full gut to do this properly.  

Steve Miller Band comes to mind..."

It really comes down to two things: quality of your tenant and your system.I would account PM fees in the analysis so if self management doesn't work out you could turn to plan B and still cash flow. 

Suddenly as I realize the rocks have been here thousands of years, the stream many centuries, and I am just passing through like every man before me, it seems easier to put things into perspective and figure out what is important to me.