I did the same thing last year. I ran 500 taps on high vac. I have a 2x6 evaporator and a steamaway and I went with an MES dolly 300 ro, 3-4x40 membranes. I would start to process around 4pm, I would usually have to haul 2 loads of sap. I would start the RO and just recirculate the sap back to the raw sap tank. I did this for about 2 hours which brought the whole tank up to 5-6% typically. Then I would send the concentrate to the head tank, at around 8-10%. I would then start the evaporator, usually boiled for about 2 hours or less. The biggest days I had over 1000 gallons of sap and spent 4 hours boiling each of those days. I have a 275 gallon tote tank that I used this year for washing and rinsing, 2 tanks would be better.
Jeff
470 taps
Torr Vac TV40D High Vac with Lapierre Horizontal releaser
Leader 2x6 Patriot raised flue
Leader 2x4 Steamaway
Wildfire arch
MES Dolly 300 3 post RO
DG 7" 5 bank filter press
and still lookin to get bigger