Option 2 is also attractive but not as attractive as option 1, since it's only a short term gain, and it is just a quick buck, if you don't wait long enough for option 2, the land might double its value on 2017/2018.

Or what can I do to prevent myself from find myself in a situation in which i buy the house-- I know double closing can place me in such situation, but what else should i be aware of?

Good job though on getting double profits on 1 house----------As a realtor when I started, I'm new to my area, transplant.

In my case the above mentioned properties ten years later close to doubled in value and the rent went up about 80% and now 15 years later FMV  tripled and rent is doubled and now the same house cash-flows about $800-$1000 per months EACH even with an occasional furnace/roof replacement.  

How can we get a double close or get the house under contract if a bank notary wants it to move to my name in the deed?

Forget the "go with the listing agent so they can get double commission" idea. 

The fact that you're only getting 25% of the appreciation in your own and you're sitting on "quite a bit" of appreciation, makes me think  that now would be a good time to cash out of that house and move on to one where you are entitled to 100% of the appreciation going forward.Historically speaking, real estate tends to double about every 20 years.

From some basic research I have learned about double closing, and it seems I do not NEED and LLC to get going on my first couple deals.  

Broker claims that with 20 year lease in place, the value of the land would double by that time.The broker's fee is approximately $150,000 total, payable to him over a 1 year period.I absolutely intend to have a commercial real estate attorney involved to write the final contract.. and the broker has offered to speak with my attorney also. 

I own a pair of doubles in a "not-so-desirable" are in Eastern New Orleans.