In your opinion what would be the most tax efficient way to start investing, for example would you recommend incorporating a ltd. company, if so under what jurisdiction?

I used to incorporate companies in all 50 States and DC.  

The solo 401k may be more advantageous if you plan to invest in real estate and incorporate debt financing (non-recourse loan).   

Would anyone consider a "cash for keys'' offer to the tenant, and if they agree, incorporate that into the estoppel letter?

Thank you, J Scott, that helps clarify.If a company is incorporated (Joe's Windows, Inc.) and is classified as a Domestic Profit Corporation, I assume that also means they would not need to be sent a 1099?

I have previously been focused on Buy/Hold and now I am looking to incorporate Wholesaling to my Business Model.

Once you get going you can always start incorporating your own contracts that suite you best.As far as your advertising, anything you can think of.

Another advantage of building for those clients is that they saw your finished product, if they like your floor plans, material selections, finish touches, it would be very easy to incorporate their project into your own project pipeline.

If we can close sooner, we will.Offers that Do Not meet these Guidelines will be REJECTEDHomepath financing is not available on these propertiesProperties sold in “AS IS” condition at time of closingPLEASE US BUYER’S LEGAL NAMES, WHAT IT SHOWS ON DRIVERS LICENSEIf LLC, will need stamped articles of incorporation pagesBuyer will need to pay $100 in order for utilities to be activated for inspections, or Selling agent may turn on utilities at Buyer’s expense with permission

I was in pretty much exactly your situation four years ago (turned 27 last week), starting from scratch making $48K per year in corporate finance, just moved to Denver.If you'd like, I'd be happy to grab a beer/coffee with you one day next week and chat about real estate and life.