I was just in a city-data forum and no one could understand why people would invest out of state or invest at all for that matter.

Although there is correlation to real estate due to foot traffic and density, the majority is driven by coverage requirements from the wireless carriers (AT&T, Verizon, T-Mobile, Sprint).

Here's some interesting real estate data for the state of New Hampshire.

I would even be willing to speculate that a majority of parks that are sold for less than $1mil have seller financing, though I have no hard data on it.

just look them up through government data (hiring contractors, paying real estate taxes, assessors, deeds) and google.

Even if you can get reliable data on how buildings operate different areas will fetch different rates for a variety of economic reasons.

I hear from those attending that this has driven average returns on tax liens to 6-9%, but that's for financial institutions with scale that can hire cheap labor to visit every site (which is a must to ensure the property is in good shape), go to the local assessor's office and look up all the liens, hold onto the lien for several years, administer the ongoing payments and any foreclosure proceedings, and run pretty sophisticated spreadsheets that estimate whether you're going to get 6% or 8% return, based on economic forecasts, etc.

You could justify you number with a cover letter, I'd just show my agent and let them convey the basis.If you got actual data from the seller and verified the numbers the seller should already know why the offer is what it is.Starting out I'd suggest single family as well, performing multis won't have much room to force appreciation, you need a distressed low performing project. :)

And or do you have any data on how successful your buyers are over time getting these things up and running and keeping them running.

This is about getting good data and knowing what I need to know before I walk into town.