I’ve been told that I should make sure at least 60% of inventory in an area should eventually sale - not lease - rather than being pulled off the market.When looking for that 60%, what time frame should I use?

They have inventory of properties in Ohio that cash flow and are affordable. 

In many areas there is very little inventory.

I was always told to include those than after those are taken out, that is your real cash flow. i am currently looking at the Philly market due to high property taxes and well not a lot of inventory around in North jersey. 

It's a numbers game, and especially now that there is more inventory coming on the market now that the rental market is hurting (which I believe is temporary), I think there is good opportunity to find a good deal. 

Resales on ultra-luxury real estate is a limited market and a hard sale, especially in Manhattan where so much ultra-luxury inventory already exists.

And it does require collateral if over $25k (but only limited to what the biz owns - equipment, inventory, etc... not RE collateral).  

It is in the neighborhood where I want to set up roots, and inventory is non-existent.

There is considerable demand for single-family houses and not much inventory to meet the demand. 

The Portland market has a high barrier of entry, low inventory and not to mention the extra caveats of FHA financing on "value-add" opportunities.