Pick a big zipcode, test your waters on that list first.For example new jersey is pretty easy to get mortgage information, but on some states you can't.Maybe set really big ranges (like 1984-2014) and see if it returns any results.

First, you mention that you are getting the exterior paint tested for lead.

Yes, there are many pretenders out there, I agree whole heatedly, calling themselves contractors because they took a test and passed a test.

Howard,You might ask them some specific questions that meet your test for responsibility, honesty and fairness.

Test for mold?

I have split tested so many ads, and I gotta tell ya.

In my opinion anything other than a .com you are wasting money.Years ago I did the .net,.org thing and was a waste of money.You can make a .net,.org successful but it is much harder to grow than a .comA big debate currently is .mobi domains for (mobile) applications.At first everyone was jumping on it but now I see big companies still use .com instead and they have a mobile version of their website that fits the phone screens.So if they have decided not to do .mobi than usually they have spent a bunch of money testing it.This is the same with commercial real estate.Developers watch to see if a Wal-mart if going in.Wal-mart spends massive amounts of money and time on feasibility studies that go out 5 years in site selection.So the little guys let Wal-mart do the heavy lifting with the studies.Targeted marketing always out pulls general sites.Take FOR INSTANCE biggerpockets.com.The message is a place for investors to meet up to discuss investing in real estate.That is the primary mission it seems to me.If it just said biggerrealestate.com and was a free for all for everything users would be pouring over content not relevant to them.So I would have multiple niches but FIRST get one niche going to where you have systems in place and on auto-pilot generating business every month THEN add another niche in to build multiple streams of revenue.You will have multiple sources of income when one stream dips a little the other is really good and they average out.It will also give you a trackable,salable business where you show the business generates xx on it's own.If YOU are the business then you have nothing to sell.

HUGE issue if on well you need certified operators to run that plus water testing is huge.Now with major concern,,,,if you end up owning this put EACH house on there own meter,,,water,,,and make them pay the bill,,,plus put a limit on water usage or septic failure is next and most places they wont let you even fix those anymore,,,they want them gone.IF this court is fronted by city/central water, and city /central sewer you can tie onto relatively cheap,,,maybe buy,,if not sounds like heartache about to happen for you.

What have you been paying for the Lead Test?

Another is a Heidi Cohen, her blog is at www.heidicohen.com.I tested this theory with three accounts.