This is not a simple answer, because how you handle the thread will affect how long it lasts, and a lot of people are not as gentle as they need to be and break it.
If you have never worked with invisible thread, you are likely to go through some loops as you get more familiar with it. Once you are good at using loops, one loop will last a decent amount of time. It's thread, so it won't last forever, but will last a decent amount of time.
But expect to spend time, and money (on loops) learning how to use it and how far you can go with it.
