Just a little bit more knowledge and experience for consideration:
Undeniably, renting at the resort can be a frustrating time suck unless you are early to park and get to the rental shop before they open.
1. I have had students come to class with two left boots on. I have had them come to class with skis or poles way too long or too short for the conditions or with a broken binding or with a binding(s) not adjusted for the size of their boots.
But it is easy to swap out equipment when it has issues or isn't right for the student or for the conditions when the equipment is rented from the resort.
2. Our resort will let you keep the equipment you rent on Saturday overnight so you don't have to go through the rental line again on Sunday.
3. It is impossible to beat the resort's "package price" of rental plus ski school lesson plus limited (or unlimited) ski lift ticket. In contrast, when you rent from other than the resort, you will have to pay full price a la carte for each of these other things at the resort.
4. Finally, traveling with skis in the car is dangerous in an accident or even a sudden stop. So, unless you are willing to invest in a vehicle with an exterior ski carrier or ski carrying ability, rental at the resort makes for safer travel. (Ever seen a vehicle on its roof or on its side and wonder how any equipment on the inside shifted during the event? Skis have sharp metal edges . . .)