NAS which run zfs?

Hi there
I have read a lot that zfs is the best ro keep your data safe and healthy. Ive already invested on 4 x 4tb ironwolf pro hdd and have budget around £500 to spend on Nas . What nas should I get to support zfs, be upgradeable to add ddr4 rams later if required.
The usage is home and small business,
- lots of small photos and video files,
- media server with wifi and hdmi tv connections,
- mobiles back ups and sync
- IP cctvs act as nvr
- business files directory read and write daily use
- clients restricted access to related documents

Thank you
Regards
Abby

Currently, Qnap allows ZFS on their Hero models 86X, 88X and 73AX. Only 1288X has a graphics chip. So options for multimedia would be limited. But others will do software transcoding if this is something you may need.ZFS system is fairly limited. You can not change a RAID or add drives. It is made to be set and left this way.If you need something for 500£ range then ZFS will not be an option. But you can look at TS-451D2 or TS-453D models. These are still good options for multimedia another mentioned functionality.I hope this helps.