I had asked this a few months back & got some good replies.
Two questions:
Community volunteers. Do not think this source can be counted on after a blizzard or would paid help be better?
Locating winter off street parking. Willing to pay, but no local overnight commercial lots are available. Should I ask private businesses or post at local bulletin boards/ coffee shops?
https://www.agingcare.com/questions/mom-is-independent-but-her-landlord-asks-too-much-after-snow-storms-what-can-we-do-473795.htm
Sorry, but this is something you need to talk to Moms landlord about. What do the other tenants do? Not living near you, we have no idea how your Moms apt complex is set up and where she needs to find parking.
From your discription of mom, maybe its time for Mom to give up her car if its causing problems for her. There must be bussing for Seniors in her area for appts and shopping..
Try nextdoor.com call your neighborhood high school and see if there may be students interested in earning some cash.