It's better to be big enough to fit your crooked teeth in.
If the teeth are not big enough to fit in, it depends on the doctor's arrangement. You may pull it out or you may not pull it out.
When I did the correction, my canine teeth were crooked, but the gap was not enough. Finally, I pulled out one of my big teeth.
As for the cost, you should go to a regular hospital, 1000 or more and 2000 or less.
But first tell the landlord that orthodontics is very troublesome, because at the beginning, you should often go to the hospital to check and clean your teeth and braces.
I usually go once a week, and I go 2.3 times a month later/kloc-0.
I did it in Shaoxing No.4 Hospital (formerly Ke Qiao Textile City Hospital), because the teeth there are better, and it is famous in Shaoxing, about 2000.
After orthodontics, the doctor will also customize braces for you to wear for several months or a year to prevent rebound.
I think the cost of Shaoxing is similar. If it is better, it must be above 1000.