If you are European, start your tourism business in Europe where all the tourists are and they have all kinds of money to spend and there are a lot of cool things to see and do. I don't know where you live now, but I think just two examples are Paris and Venice but there are plenty of others. People go there because they don't know where else to go or what to do. So you have an overwhelming number of people there and in many other cities. Take them someplace else and someplace fun.
Don't throw your money away in Phuket where the tourism business is sketchy, often low budget, and pretty much you will be locked out of 80% of the market if not more. If you are not Russian or speak Russian, do you think you can lock up Russian market? Same with Chinese market, or Japanese market...or local budget market.
Why would you want to get your money out of Europe and into a shaky 3rd world economy like Thailand? That sounds like a good way to loose everything you have worked hard to obtain.
No matter what anyone tells you or what kind of workaround they think they have discovered, you cannot own land as a foreigner in Thailand. Even if you could, there would be no ROI for you. Look at the prices of land vs what you could charge per night for similar accommodations that you envision.
Don't buy into anything you can't control. Your 49/51 is correct, but that means your partner is in control. They are cracking down, especially in Phuket where the 51 is controlled by a lawyer or nominee just for that purpose.
If you spent a year in Thailand did you do your market research? Did you do market surveys on rent?
Plenty of people do this for a while like Russians, but at some point the Boys in Brown crack down.
Someone will get jealous and turn you in. Maybe your partner. Maybe your staff. Maybe the staff you fire. Maybe your competition.
What's your 3rd silent partner budget? The BiB budget?
Read the news here regularly. Plenty of people get busted. Just a matter of time.
Can you hear in Europe that giant sucking sound from the weed business in Phuket? That inhale is the sound of foreigners and locals too losing their shirts, shorts and slippers on the weed business.
If you want to move to Thailand, do it. Just don't dream of running a buiness or buying land. Work remote with European income. Or spend you savings on rent and food. Don't risk it all on a risky illegal business.