What are the steps and considerations for obtaining an LTR visa in Thailand, especially with same-sex marriage and dependent visas in mind?

Update: thanks for all the helpful replies. I'm definitely sticking with the LTR visa and the BOI confirmed my wife will qualify for a dependant's visa once same sex marriage takes effect. I'm no longer using that visa agent and found a list of accredited agents on the BOI website to choose from.

Hi all, I'm looking for a little clarification on something. I'm looking to move to Koh Samui next year.

My original visa plan was to get an LTR visa based on working for a large off shore company. I meet all the requirements and have been working on gathering all the paperwork. I have a wife, and I was hoping once same sex marriage passed she could get a dependant's visa under me.

I spoke to an agent, and she told me that the LTR is prohibitively hard to get and that even though in January same sex marriage will be law that it will not validate for dependant's visas.

She suggested I get a DTV workcation visa and my wife get a DTV soft powers visa. She said Thailand will ask for my employer's tax fillings for LTR, which isn't something I can get. I was under the impression I wouldn't need that since it's publicly traded. Without the option for a dependant's visa, I guess my wife's only real option is a DTV visa.

My questions are:

1. Does anyone have experience getting an LTR visa working for off shore company? If so, how was that process?

2. Is it true that even after same sex marriage passes, it won't count for visas?

3. Are there any DTV accredited culinary schools in Koh Samui?

I get that Facebook probably isn't the best place to get concrete info; however, I'm starting to doubt my agent. If anyone can suggest an agent in Koh Samui for a second opinion, that would also be great.