A local reefer to me actually does this. When he does a water change he puts the water into a 50 gal water trough with mangroves and macros galore. Main issue he faced when starting was salinity and hair algea. I talked to him for a while about it.
Maintenance is:
Check salinity every other day
Top off with rodi or salt depending
Never test the water
If a heavy rain is predicted he covers it with a tarp
Monthly 30 gallon fresh salt water
Stocking:
6 bangi cardinals
3 chromis
1 lawnmower blenny
Equipment:
2 4k ice cap gyers
24 in pvc pipe with air pump for additional air movement
60+ lbs of live rock
Sand
Miracle mud
In the winter he brings everything into his garage
Biggest issue is with evap and high Ohio temps.
It will be 4 years old this summer I think.
If you have any questions I can try to relay them.