Usually is below rm500. And pricing can depend on what circumsize technic u want to go for. Some clinic do traditional way, freehand. Some modern way the clamping technic, alot parents prefer now a day for their kids. And got stapler technic but expensive. I heard clean cut.

Most people prefer clamping now a day.
Stapler i not familiar but many said less complicated and fast, and clean cut, recover faster, but expensive.

I think u better just go for clamp method. Good thing is clamp method no need stitch. By 5 days can take off clamp. And less bleeding also.
But still quite alot people go for freehand also.
Laser method also ok good, but still need to be stitch.

For adult u opt for less bleeding method. Make sure u dont have health issue or complication. Usually adult sunat the doctor will ask abt ur health 1st either u fit to be circumsize or not.
If u want clean look choose the one no need stitch.

I forgot abt the erection part. Yah it will be very painful if erect in the tube clamp damn. Adult everyday will see hot sexy amoi, sure erect one lulz! Before go clinic wanna remove the clamp need to soak in water at home to loosen up the clamp so that easier to take out. But in rare case, clamp difficult to take out do happen. So gonna have pain 2nd time like u said.
No need say clamp, even circumsized handfree traditional way, if suddenly erection also very painful already coz it pull the stitched skin that not yet used to be stretched.
Children do erect especially the time wanna go pee, and during sleep at night. It simply erect itself at night.

Yes coz the clamp size is fixed and small. Cant imagine the pain if erect in it damn.