Ok... realistically, until treatment starts what options do you have that could help with the amount of wash and the issue of drying them. I stand by my suggestion of cutting out one pair of pants. Just
ONE pair. That's one less to wash and one less to dry. That goes for whatever else you're changing.... socks, shirts, underwear etc. Just ONE.
You could take out two pair in the morning and lay them out. Choose one to start and the other to change but put a time limit on it. Say no changing until 1pm no matter what. Look, I know your OCD will scream in protest but you have to start somewhere