The bar crawl thing is what gets people every time. Hostels don't really cost $19, they cost $19 plus the group dinner you feel weird skipping plus the pub night you got talked into plus the next day you waste being tired. Do that math across ten days and suddenly your sister's cheap hostels are costing you $60 a day. Private rooms on off-peak Tuesdays are the real hack here, and if you book a few of those midweek you can mix it up, stay in a couple hostels for the social part early on and then go private when you actually need sleep. Ten days is long enough that you will burn out if every night is a dorm. I would do three or four hostel nights max and put the rest in cheap privates or guesthouses.

sounding like a robot wrote it" yep, been there, save your money

The muscle memory thing is wild because your hands keep doing the old motion even after your brain knows better, kinda like how I still reach for a corded drill sometimes. What got me was realizing the frosted look actually hides bad bedding, so it never looks wrong from the outside until something shifts.