He has always been been very loyal to me through thick and thin so I would be greatly surprised if I had the issues that @Bryan Creed had.

(a website with thin content created for the sole purpose to give several websites a backlink.Example:http://tramadolpills.net/categ...Count how many different REI websites this one page is giving backlinks to you included.

I have several mobile homes on private land and they have appreciated more than my stick built homes.It is true that some mobile homes are built with cheap fixtures like plastic faucets, thin plastic tubs, cheap cabinets ext.

Seriously, stop pulling random BS statements out of thin air, really.  

How long do you tolerate the cash flow situation you describe while hoping to avoid any big problems waiting on the appreciation to offset your thin or in the red rentals? 

We know that in vast majority of markets it's very VERY hard to produce or create new rental inventory because the margins are so razor thin or non-existent. 

One worry with the buying multiple homes quickly plan is whether you are stretching reserves too thin.

Taking into account a global economic shock, a coinciding drop in energy prices, many small businesses that won't recover, unemployment, the possibility for a run on US Dollars which could cause the USD to spike, plus municipalities and retirement funds who were already on financial thin ice – there's a great deal of risk and the combined headwinds are enormous. 

Secondly, I dont want to spread myself too thin, especially in the begining.

Since you're not stretching yourself thin on the first deal you can always pick a stable market and buy a relatively newer, rent-ready single house and just get a deal done so you're familiar with the process and you'll learn a ton just from that.