I generally figure a 10% vacancy rate. 

There are some steps you could take to make it a little less obvious, but like I said, if someone really wanted to figure it out they probably could no matter what you did. 

I was rather surprised by the rate - I wasn't looking to refi, and also figured it was a little too good to be true.

To answer your second question, yes profit/cash flow per door is one of many important figures to factor in.

Though, you'll have to figure in closing and fix up costs in your calculations.

The other thread may be a better title, and I can't figure out how to delete this one.See here:https://www.biggerpockets.com/forums/12/topics/557887-save-or-buy-my-first-rental-owner-occ

Just figured I would share since it seemed relevant to the discussion."

Contact Hunt Rounsavall or Harry Borders to get title search started and start figuring out who you need as contractors and what’s needed to get the property going.

I live in center city Philadelphia in the Fairmount/Art Museum area and I have a huge grass backyard that I am trying to figure out how to rent. 

I've been looking into tax deed investing in California and am trying to figure out if land is easier to flip than property or if they both have the same issues with the title needing litigation or special services to sell for retail on the market.