I believe the origin of this rule was stemmed from mobile home investing. 

I found the BiggerPockets site while researching decision-making practices used by RE investors.I’m a part of an exciting startup, dedicated to making nationwide property & ownership data accessible to everyone on their mobile devices. 

HI allI am having issues opening my INBOX and from mobile site.When I click my profile pic on top right, and select INBOX, FRIEND REQUESTit goes start to my profile... and I don't know what to do from there.I have been waiting to get to my desktop to answer inbox.I haven't explored the site on the mobile in depth.

@Alex FlowersI ran into same problem with mobile home park.

Also, being able to build my own website/app for my REI company would be awesome as well.

In some places, like Texas where they can grow the mobile homes big- we want 16 x 80 homes.

Once you network with local Reia,investors etc, you will find attorneys that already have title companies, staff etc, with all this stuff in place. you don't have to invent the wheel.I used postcard with business phone number app i use on my Galaxy phone, and yes, this deal came from Direct Mail, we closed about 2-3 weeks after offer.

The website/app Houzz has wonderful photos of exteriors that you can use for inspiration.

i know ticor title (google them) can give you online/mobile access to look up properties, but you'd have to talk to a rep and/or establish a relationship with an agent who might be able to get you that access.anyway, congrats and keep at it!

I read that Sam Zell is the largest holder of office units, the largest residential unit owner and the second or third largest mobile home park owner.