At first it will be a little more work but as time goes you will instantly know what is a POTENTIAL good deal vs what is outright bad deal.  

When I tried to offer a low ball price of 220,000, the broker instantly said "save yourself some time, it won't work" and hang up. 

Are you closing the land deal contingent that the developer delivers approved site construction documents?

As a Brokerage, I can set up a custom search that is delivered to you daily (if there are new listings or changes) and if needed, one of our agents can walk the property, take pictures and I can supply a repair estimate.We also have contractors that can do the rehab work, and we will also mareket for you as a rental or sale.

Use Aimloan.com --  you can get rate quotes instantly on the internet without talking to anyone, and no one can beat their rates.

Lenders must not deliver SFC 150 on loans underwritten to the new policies.

Is that an instant red flag that causes you to move on from a property?

This means:1 - You must first find the lender for the refi, so you can know the terms for refi, and base your market/property search and the market/property ability to deliver your financial needs (see below) on the lender's terms.2 - You must find that Market that will consistently deliver properties that follow the profile matching the financial criteria dictated in Step #13 - You must be able to find, and properly analyze  the properties found in the Markets established in Step #2 so that the refi amount will cover the credit debt.Here is the problem you will have though.  

Offset these costs in the price and have the purchase agreement contingent upon the property being delivered vacant.

Instant lawn, just keep it watered till the place sells.