That list makes hardware RAID sound safer than ZFS, which is probably not quite true. But is the case is that the average implementation of hardware RAID is quite a bit safer than the average implementation of ZFS software RAID. Hardware RAID "handles everything for you" protecting you from most bad decisions. ZFS leaves all the nitty gritty details up to you which makes it super, duper easy to mess something up and leave yourself vulnerable. This is exacerbated by the Cult of ZFS problem and loads of misinformation swirling about its use. So the average person using ZFS is not even remotely prepared for what is needed to use it safely.
Some problems that we see people have when using ZFS without fully understanding storage:
Believing that ZFS doesn't use RAID (this is extremely common.)
Believing that RAIDZ is magic, rather than a brand name, and that normal RAID concerns do not apply. So we often see people implement RAID 5 in reckless, insane situations using "it's RAIDZ" as an excuse as if RAIDZ isn't just RAID 5 - literally just a brand name for RAID 5.
Treating common features common to all RAID systems as "unique" and believing that ZFS has feature after feature of protection that makes the need to protect against storage failure unnecessary.
Not understanding hot swap and blind swap differences and creating systems that they do not know how to address should a drive fail.
Believing that ZFS being magic is not at risk from power loss and failing to protect caches from power issues - something that they are not normally used to dealing with as hardware RAID does this for you.
Not understanding the CPU and memory needs of ZFS, especially with features like dedupe and RAIDZ3.
Ignoring common RAID knowledge and thinking that using ZFS means not using mirroring technologies.
I would recommend looking at StarWind SA for example.
That solution fits your requirements perfectly, it will also provide you with HA storage that will ensure the business continuity.
As for support, they offer a single point of contact no matter what issue you face, plus the system will be shipped to your site fully preconfigured and pretested.