With regards to backups, remember that an offsite backup is useless if you cannot access it. This sort of segues into disaster recovery and business continuity. Imagine your site gets vaporised by an exploding oil tanker during the night and you have a deadline approaching.
Holy hell no, find a reputable outfit locally, posting on CL is kinda like asking around for a freighter pilot at Mos Eisley cantina. Sure…plenty there, but many are shady.
Yes
They are not computers per se, they are purely file storage boxes, excellent ones, but they have no ability to run the share side software crucial to a good performing QB install. They are not windows, they are proprietary OS’s designed for stable efficient file sharing.
Will do.