When searching what you inquired about, this site is at the top... 

A lot of forum members are experts in their respective fields related to real estate investing, whether that is real estate sales, wholesaling, flipping, buy and hold investing, lending, self-directed IRA and Solo 401k investing, or tax and legal guidance.There are some pretty nice discounts on many products and services offered as Perks to BP members that you might want to check out: https://www.biggerpockets.com/perks/proIf you haven’t been to it already, the Bigger Pockets blog features links to their fantastic podcast and many great articles: https://www.biggerpockets.com/renewsblog/The site has quite a few tools that can be helpful for new members.

A friend recommended this site to me and I am about halfway through their beginners guide book. 

You may also consider the power of a site like prop stream where you can see who owns a property and which other properties they are linked to. 

Hi I'm gege new to the site starting the Wholesale investment and need help finding seller, where should I brand myself is there an email pitch or a call pitch I can send to seller, like people in foreclosure, or bankruptcy, or late payment and where will I get the ARV, Repair Value, Offer The price that you need to get it under contract for and  where do I get the contract form and if I get a seller and a buyer how do I get a legal person to handle all the paper work for closing.

Suggest you go to their site, there is approx 7 videos for you to watch to see if you want to go to the next step. 

Is it as simple as getting the site designed and engineered for the footprint, cleared and graded (all of which I am comfortable with), and then hiring a GC to build the building?

A new site for NH foreclosure auctions just launched called Bid Pirate, worth investigating.

JD, don’t disagree on some of the points you’re making above on responsive Web versus mobile app development, but it all comes down to level of engagement and what you’re looking to do with a site or service.

Here are some details, from a non-HUD site and from HUD.