There are some very sound old Toyota trucks for sale for little money. Cheap to insure and service but like the diesel. A bit rough and ready but I had one for two years and it had
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0km on it when I sold it for
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0 baht. I paid
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0 baht for it. 2700 baht a month! Failing that I also rented a Yaris for 18 months at
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baht per month. Make sure you have good insurance with low excess. I demolished the front if one car and it cost me 7500 baht. I had a new car within the hour. A Thai driving license helps but you must have an idp to go along with your home license. Legally you can only drive in Thailand for 90 days without Thai license. Dont drive it do anything if a motoring nature that you are not allowed to do in your home country or most likely your insurance will be invalid.