Owning a house in Thailand is no different than anywhere else in the world.
Things will and can break down, and this is to be expected.
Unless you are handy and have your own tools, you will end up paying for labor to fix your housing issues.
Depending where you live, this could cost a lot or if in a rural area, maybe not so much.
It is a good idea to have your own tools, so you can fix the basic issues in a timely manner without waiting.
Having the right tools makes the job easy and you will find many jobs you can do yourself.
Changing light bulbs, basic plumbing issues, cleaning air conditioning filters and lawn care are some of the jobs you can do yourself with basic tools.
If you have good quality tools, you may want to think about bringing them when you move to Thailand.