Based on what you have described, I can’t see why you would have to keep reinstalling just because the internet is unavailable. I can have a PC off for weeks and the console will complain it’s been offline for 30+ days but have never had to reinstall. Sounds like something else is going on.
It sounds to me like maybe offsite cloud management is not the best solution for your environment and you might want to investigate onsite host solution for management. AfB cloud is mostly geared toward Managed Service customers or SMBs with no onsite IT admin.