In fact, the key to the problem lies in the high utilization rate of treadmills.
If you think your perseverance is ok, you can keep exercising every day. It's good to buy a treadmill. You can run on the treadmill when you have nothing to do. The benefits to your health definitely exceed the value of this treadmill.
If you feel that your perseverance is poor, it is useless to buy a treadmill because you are afraid of fishing for three days and drying your net for two days. What a pity.
What should I do if I feel my perseverance is average, I want to give it a try and like sports? You can buy a second-hand one at this time. I think the utilization rate is high, so I can buy a better one. Or buy it first if you have money, and then hang it on a second-hand website to sell it if you think the treadmill is useless. If it is well maintained, you can get back at least half of the money.
On the other hand, from the point of view of physical exercise, running on the treadmill belongs to aerobic exercise, and its greatest function is to strengthen the heart and lungs and reduce fat. If you want to make your body stronger, you should do more anaerobic exercise and increase muscle mass. Of course, it must be accompanied by a reasonable diet, but this is another story.
I can only help you here.