Here's a list of things you can't do!
Labor work except labor work in fishing boats under the next category below.
• Agriculture, animal husbandry, forestry or fishery, except work requiring specialized knowledge, farm supervision, or labor work in fishing boats, particularly marine fishery.
• Bricklaying, carpentry, or other construction work.
• Wood carving.
• Driving motor vehicles or vehicles which do not use machinery or mechanical devices, except piloting international aircraft.
• Front shop sale.
• Auction sale work.
• Supervising, auditing, or giving service in accountancy, except occasional internal auditing.
• Cutting or polishing precious or semi-precious stones.
• Haircutting, hairdressing, or beautification.
• Cloth weaving by hand.
• Mat weaving or making utensils from reed, rattan, jute, hay, or bamboo.
• Making rice paper by hand.
• Lacquer work.
• Making Thai musical instruments.
• Niello work.
• Goldsmith, silversmith, or gold-and-copper alloy smith work.
• Stone work.
• Making Thai dolls.
• Making mattresses or quilts.
• Making alms bowls.
• Making silk products by hand.
• Making Buddha images.
• Knife making.
• Making paper or cloth umbrellas.
• Making shoes.
• Making hats.
• Brokerage or agency except in international trading.
• Professional civil engineering concerning design and calculation, systemization, analysis, planning, testing, construction supervision, or consulting services, excluding work
requiring specialized techniques.
• Professional architectural work concerning design, drawing-making, cost estimation, or consulting services.
• Dressmaking.
• Pottery.
• Cigarette rolling by hand.
• Tour guiding or conducting.
• Hawking of goods.
• Thai typesetting by hand.
• Unwinding and twisting silk by hand.
• Clerical or secretarial work.
• Providing legal services or engaging in legal work (except arbitration work sand work relating to defense of cases at arbitration level, provided the law governing the dispute
under consideration by the arbitrators is not Thai law)s
AND ... If you're over 60yrs old .. the chances are you won't get a B2 work permit anyway ( you'll just have to finance the wife and hope it all goes okay

)