100,000 baht ????
Why not just join Powerhouse Gym up there. the owner is a cool guy. I think he is from South Bend Indiana or somewhere close. it has a tone of equipment and free weights and the price is not bad either.
Unless you are looking to workout at home.
If you are, I would recommended getting Scott Helveston's (RIP killed in Iraq) Navy Seal Workout on DVD.
I was doing it years ago and had to do the intermediate program it was so tough I could hardly keep up. They say it is all a person needs to get whipped into shape.