The cost will depend on your specific case,
its severity, and the area that you live in. Palatal expanders are generally
not used in a 20-year old because the palatal suture closes at around 12-14
years old.
Your Dr has determined that extractions and braces are needed. There are many reasons for this and your treatment is best done this way. What other people have had done does not make it right for you. you are not a car you are a person and unique. Aliners can not close posterior spaces and brace...
Tooth movement does cause soreness. trays need to be left in and not be taken in and out alot or things will get worse. If the pain gets worse then talk to your Dr and make sure things are ok. Not perio or abcesses. Sometime an aspirn will help but time is the best relief