@David Bailey
I look at it slightly different. The 6% base on sales price tells you exactly (or pretty dam close) what your taxes will be. It makes underwriting them easy.
It's not you or your underwriting. Deals are just plain hard to find in this market. Start thinking about how you can better source deals. Are you getting them from the MLS or direct from the seller completely off market.
You are taking massive action underwriting deals. Just keep at it. You will come across one that works. Patience and persistence is the name of the game. Establish your criteria now when emotion is not part of it. DO NOT CHANGE YOUR CRITERIA in the middle of looking at a deal. There is a reason the criteria is made now, no emotion. You can re-evaluate it from time to time but never to get a deal to work, that' how you get into trouble.
There is no inaction while you save. As you save it's when you work on your network. Contractors, Financing, other investors, brokers, etc. You are doing all the right things. What you need to do now is stay consistent and persistent.