Of course you will need a license to purchase one or you purchase one and they arrange license for you.

how on earth it possible that they arrange the license for you ? You need to seek approval & clearance yourself..

Purchase and have license transferred to later or go small town and get one through district office.

There's another very informative thread about this.

You get a licence, or your wife does, at the local Amphur. There's no other way. I've asked at a gun shop more than once and also asked the local cops.