So, those 13 clients weren't impressed enough (or reminded) to write a review on the most public buyer site out there.And no, they are not all this year.

I would like to know which sites are reliable to do some market research on population growth, and income on zipcodes, and counties in Delaware.

Steel site.

Here are a few suggestions on how you can maximize the wealth of information available: Check out the blogs and podcasts, or take advantage of the search feature (magnifying glass).

You're not on site or within driving distance and even with a property manager, lots of things can happen. 

@Alan Asriantsagree and I think it's time for every experienced investor on the site to start being honest about cash flow in that THERE ISN'T ANY FOR THE FIRST FEW YEARS.

I've butted heads with mods over various topics, to include what should/shouldn't be allowed on the site.

We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

Definitely should check out J Scott's book on estimating rehab costs: https://store.biggerpockets.com/products/the-book-on-estimat...I wrote a long article a while back on due diligence that would also be worth reading (well, at least I think it is): https://www.biggerpockets.com/blog/due-diligence-ultimate-gu...

We take it a step further and build in factory then deliver the units to the site.