Rent rates keep climbing, and inventory is low.

However, if the mortgage rates slowly increase over time (say .5%-.7%/y), this might not happen. inventory would get tighter (less incentive to sell if new mortgage is more expensive), which would keep driving prices up  

Could be that the serious investors are getting them for much better than 1.5-2% and the 80-115k inventory is sitting on the market waiting for a "retail" buyer.  

To my understanding, there isn't much value that you are adding by becoming the middle person other than being the one who picks and chooses from the TK inventory.

Since in most cities and states are experiencing low inventory and making it harder to invest, especially when you have to compete with cash and having the ability to close quicker than people with financing.I live in Dallas Texas a County and was born and raised in Dallas.  

I really want to work on expanding my inventory and obviously the next step is to find that next deal.

Inventory isn't high so check often.http://www.hubzu.com/  - Same as Taza.

There is very little rental inventory and a lot of people with high incomes that want to live there.  

Minneapolis may have a great inventory of rental properties, but, as someone else suggested, research, research, research!  

Real Estate in India is going through rough phase these days and thus inventory has gone up to several million square ft.