Qualified joint venture: QBI and other questions

Hi, 
I setup a new LLC as a Qualified Joint Venture in a community property state and proceeded to file two Schedule C in turbotax.  

So I now have two Schedule C with two different descriptions  ("Principal business or profession") for the same business name.  So far so good..  I just named one description X-1 and another X-2 with same business name: X

It now asks about QBI information.  I don't have any income and just some minimal expenses (like license fee).  Should I elect these two Schedule C as QBI?  It sounds from Turbotax that most businesses are QBIs..  So I just selected "Yes".

The most confusing part is about "Should X-1/X-2 be treated as part of a combined business?" as part of QBI worksheet.  They aren't exactly a combined business, they are a single Qualified Joint Venture (same business with name "X").  I am at a loss on what to fill out here..  

The exact question is:

This business is part of the following activity:

- X (name of my business)

- This business is independent of any other activities

I also have Turbotax Premier.  Can it handle Qualified Joint Ventures or should i need to upgrade to Home & Business?  Do I need to file Schedule SE today/in the future?  I don't have any income this year but when is it considered self-employment income? any income from business is self-employment income?

finally this is suppose to be an Airbnb rental business (but we never tried to rent it).  Airbnb can be Schedule C or Schedule E.  Does it conflict with Qualified Joint Venture in any way in the future especially if we consider Schedule E?  How do I choose whether to use Schedule C or E in the future?