I share my personal experience, this one works with me.
I use Helios64 on SD Card 32Gb, with this version
https://imola.armbian.com/archive/helios64/archive/Armbian_21.08.2_Helios64_buster_current_5.10.63.img.xz
installing omv with this script.
https://github.com/OpenMediaVault-Plugin-Developers/installScript
I modified or added a few lines in files but I can't tell you exactly which one and how because I forgot since.
I use 3 SSD disks individually managed by OMV + Containers.
no raid, just EXT format
Nothing special, but it is sufficient for my family use.
With 45 cents per kilowatt, Helios64 + SSD will cost me a maximum of 40 Euros this year. (Energie cost 2.5x since september)