@Django: let me share a few comments to the backup-related questions/points in your recent posts
- The standard method of doing backup and backup restore in ERP Next is summarized in the discussion thread per Backup & Restore - #3 by Jonathan_Fanny_Lie (respective bench commands explained in the reference in more details). That’s who developers in Frappe assumed it to use by the end users
- There are options to integrate your backup facility with Dropbox - see https://frappe.github.io/erpnext/user/manual/en/setting-up/third-party-backups and Setting up Backup Manager · frappe/erpnext Wiki · GitHub for more info
- phpmyadmin can surely work as a tool for the database backup - however, you have to take into account that every backup point should aggregate both the database backup and the backup of your site and custom application files (that’s why the method per the item 1 above designed)
- It is a good practice to also replicate your backup files to an off-server location just for redundancy and fault-tolerance reasons
As for your question on hosting with Frappe-managed ERP Next cloud, it should be determined by your choices. Your choices will in turn be dictated by the extent of customization/functional extensions you would like to apply on top of the standard capabilities of ERP Next. Everything that would require serious extensions (especially with back-end programming, new DocType introduction etc.) will not be facilitated in Frappe-backed cloud environment. You will have to set up your own server for the purpose then. Such a server can be obviously a cloud-based one 
- AWS, Digital Ocean and plenty of other options exist in the marketplace to go.