oops. I was thinking you get 15 from event plats but it's 3so without spending SCs you should be able to get 30 from a farm event if you don't want the unit. Actually now that I look at it, I haven't used any of the farm units from this year and all the farm units I used from last year I stopped using.
However my overall point still stands. Slow and steady and you can get him or any others they add (DMM has 2 1000 and 2 400 RC units I believe).Gold rush could be a big bonus as well. They give the full 20 and you can get many dupes that have little value.