Currently I'm using Macrium Reflect Free to take FULL images of the six Windows machines (one is dual boot XP/W10) , backup is to Ubuntu Linux server running Samba with a 22TB RAID5 shared drive.
I also take images to tape (LTO-4) over iSCSI, but the boot-able SW I used to use won't work with my latest machine as it doesn't support the NIC - I used to like brand-X, but I've fallen out of love with them over the last 10 years or so with their buggy bloat-ware.
I can (sort of) live with loosing the 22TB share as it's only use to store music, movies and backups. It can be re-created if necessary (though its a pain - esp. the music). Sadly I can't afford LTO-8 drive/tapes.
Requirements:
MUST be able to do a bare metal restore of any machine at any time.
Able to restore to different (replacement) hardware for migration or to handle problem like a dead motherboard!
LTO tape support over iSCSI (or other means) - maybe via backup server (T-T-D)?
Would be good to be able to do bare metal backups too!
Free or cheap

Thanks
David