No, first it isn't your land but your wife's and secondly:
Prohibited jobs for foreigners in Thailand | Thaiger (thethaiger.com)
What jobs can’t foreigners do
Thailand has a list of restricted jobs for foreigners, often called the “reserved occupation” list. These jobs are protected for Thai nationals to avoid competition in fields that don’t require specialised foreign expertise. Some of these include:
Manual labour: Anything involving construction, carpentry, or factory work.
Agriculture: Farming, animal husbandry, forestry, or fishing are restricted.
Retail and trading: Owning or managing a small retail shop or working as a market vendor is off-limits.
Artisan and craft jobs: Jobs like woodworking, hairdressing, goldsmithing, and sculpture are reserved for Thai nationals.
Driving: Driving jobs, including taxi driving or truck driving, are not allowed for foreigners.