The answer will be dependent on your fact pattern, so a general forum like this may not be able to answer such a broad question.With regard to the LLC structure, note that CA does not recognize series LLCs, and CA tends to have a broad opinion of what constitutes "doing business" in the state, and therefore, what LLCs need to report with the CA Secretary of State and file appropriate tax returns. 

I've seen up to 85% LTC for an experienced builder who has done personal projects.

The only time I will go to a closing is on the brokerage side of our business and it is a first-time home buyer. 

Turnkey generally don't exist and value add generally makes no sense from a business and financing overview.3.

I believe you are supposed to register your out of state LLC in each state that is does business in though.

My business partner and I already set up an LLC and we are looking to start acquiring RE with two other individuals through a joint venture type setup. 

A great way to network and meet people in your local community is to attend in person meet ups.

We have built a successful business and are looking to expand in the future.

@Mark Adams, you are attempting to enter one of the most competitive fields of any real estate related business.  

So that is always dependent on personal emotion.