My advice initially is to find out whether In fact whether you will be able to get a work visa as a "mechanic", if you are followed internationally, perhaps contact one of the racing organisations and offer to teach Thai,s your skills if they assist you. Otherwise I doubt whether will get a work visa. Only other way would be to invest capital in a new business startup. You will need to go the BOI for their rules
many don't realise that regardless of stamps in the passport, all the data is on the system, and they have algorithms that highlight certain types, a mate who does FIFO was interviewed at length, and after giving his work schedules they made a note on his file so he doesn't get queried again
Well done, I think it's a learning process for embassy staff as well, as most of them have only processed on fixed requirements, this visa they are making decisions, a very unusual thing for most public service employees
Others have given you advice, so here is one more thing to be aware of. Under some schemes owners cannot be charged for non payment of the annual fees, the body corp has to wait until the unit is sold and outstanding fees are deducted at settlement. If their are a number of non contributing owners in a block, it sometimes means there isnt enough cash in the bank to do essential repairs. Always check the rules of the Block you are buying into
Given that Thailand is moving to E registration prior to entry as announced in the last week, it's sticking out that they will also be looking at misuse of various visas or visa free, so that some travellers will have red flags before they hop off the plane.