When I find a park I literally have to make a formal financial presentation to her showing all my research, park's financial history, cash flows and anticipated proforma (and that had better be accurate and conservative or everyone in the room catches hell- including the dogs). 

Furthermore, Intel is spending 20 Billion dollars to build two semiconductor plants, and many more great things presently and coming in the future.

This might be an interesting idea to present sometime.

I have never worked with them, but I have had a presentation from them; that would be one of your cheapest option assuming everything they say to you is true. 

Smart buyers understand the value of a Buyer's agent and it certainly is not just to open doors.  95% of my clients are out of state investors purchasing in a market that they do not know nor live in, they count on me to walk the property, access repairs, provide comps and short term rental numbers, arrange and be present for inspections, as well as my ability to assist them getting their short term rental set up for them long distance.  

This is only for Jackson County, MO (Kansas City) but if you're interested, you should check out his presentation on how to approach it: 

We actually just had someone in Atlanta ask us to arbitrage his property and it's a question that is presented us every several months.

I was presented an off market property in the Sherbondy Hill neighborhood, along 261 and the Interbelt.

Also, comparable sales need to be present within 3 miles of your subject property.

Instead of it being more of a level playing field, where commissions were essentially standard, a lower asking price with a buyer paid broker or a higher asking price with a seller paid buyer broker will be something for investors to consider before presentation.