So when you, as an investor, are valuing your personal income producing property or a potential income producing property deal, gathering accurate cap rate data is essential in getting the value correct (using an income approach, that is).As a side note, professional commercial real estate investors (REITs and PE funds) and commercial lenders rely almost exclusively on DCF values, so if you're looking to get into that space, they will expect the same. 

Local TV and newspaper web sites may provide some info. 

He also writes for a major newspaper, I think it is the Wall Street Journal.  

He emailed the offer purchase contract to me along with the Exclusive Right To Buy Listing Contract.

His strategy is exclusively mobile homes.

The longterm population growth shifts predicted are almost exclusively in Southwest states.

Pva, brokers/agents, Loopnet.com, lead list companies can pull the data, driving for dollars, apartments for rent on: (Zillow.com newspapers, property management companies or even on HUD website), Realtor.com Hope this helps

Suggest you think of a sliding scale too, since you ask as if there was only one "project", but if it's an exclusive on an 100 60,000 units, you could reverse the commissions, 2% first 20, 2.25% next 20, 2.75 on the next 20, 3.25 next and 4% on the last 20, this gives an incentive to keep selling as the deal thinner toward the end, but usually easier to sell.

Websites, blogs, newspapers?

It just has to be exclusively for the benefit of the IRA.