The oil/gas workers previously would often just enter visa exempt.
Eventually io will pull you up on that and suggest long term visa.
Most likely METV is not long term solution.
Married guys have more options.
Being over 50, suggest your best option is to obtain a non O and subsequent 12 month extensions.
The 30/45 day extension window might be tricky.
Re drivers license and purchase of bike...depends where you live.
Bangkok requires a residence certificate and that's an issue as you would not be doing 90 day reports.