the good side of burst is that you can use every hdd/ssd you have, even with realocated or bad blocks or ready to fail ( smart problem ) disks
as long as you can read from it, it generate Burst with no penalty

the other 2 you need to run over raid1 ( mirror ) if you don't want to lose money


with 18Tb on Burst for 1 mounth I have 17000 bursts
you can do the math with currect price