This might sound naive but what about purchasing a used chest freezer, a large one holes about 180 gallons, install a vessel of some sort and pump your concentrate into that? Maybe even let it go through a whole house UV sterilizer unit. I know I have had good success extending the life of raw sap by filtering and then processing it through a UV lamp(mine is a Grimm branded lamp setup). This is the first year for me to have an RO and I plan on all my concentrate passing through the UV lamp on its way to my feed tank. I guess i'll let you know how it works out in April, lol.
2023 - Add more taps on vacuum, build new sugar house
2022 - 52 Gallons - DIY RO, 50% less fuel, no late nights in the shack!
2021 - 48 Gallons - new pans, new arch, lots of new taps and tubing
2020 - 32 Gallons
2019 - 27 Gallons