I have only used my new RO twice and am amazed at the time it has already saved. In the two times I used it I have saved an estimated 14 hours in total processing time between ROing and boiling for 315 gallons of sap. That amount of sap would normally take 22.5 hours of boiling at an average rate of 14 gph from lighting the match to shut down. The time it took to boil the concentrate after ROing was 5.5 hours. 17 hours saved in actual boiling time. That is a ton of wood saved and a lot of sleep gained.
You will find it will be worth firing it up with way less than 70 gallons if it is concentrate. Sounds like you will be tripling tap count for next year. I have no problem firing my rig up with 20-30 gallons and have even fired it up with 10-15 gallons if the sweet has been sitting for a period of time without any major runs. I will still probably continue to do that if runs are not big enough to push through the RO
I had planned on building an RO this coming off season, but I got impatient with the abundance of low sugar sap this season so far and went ahead and bought one.