Yes, I was also wondering how he was able to buy land in his name...
He can't, there are 2 options...
1. Buy the land in the name of a Thai person, wife or someone you think you can trust then have them lease the land back to you
for 30 years with an option to extend for another 30. If the relationship ends you will lose everything.
2. Start a Thai company in which you can own up to 49% of the shares and buy land through the company, I believe the remaining 51%
has to be made up from at least 3 Thai juristic people that your lawyer can arrange for you. Again, the Thais will own the majority share
without putting any of their own money in, if the relationship turns sour, you will lose everything.