It seems a foreigner cannot own land in Thailand on his own account, but may be able to own a condo. Is there any type of development with more land and seperate houses that allow foreign ownership?

As an example maybe a Rai or so of land with homes pre built.

You can own land through a Thai company and with BOI approval you may just get more than 49% ownership.

Maybe in the area of a golf course? That would be where i would start to look.

I'm not aware of such a work around for land. The only possibilities as far as I know you do it in 3 possible ways:

1) through a company. You own 49% and with preferred shares you have a controlling majority.

2) through a lease. For example you pay for a 90 year lease from a Thai company or individual

2) through a usufruct agreement. I.e. a temporary ownership of a land/house, say for 100 year for example.

Hope this helps. Otherwise suggest you meet a lawyer who probably can walk you through all details and maybe has more options.