Anybody else blowing all their donuts on wailing walls?

I'm on the fence (wall?) about this. The multiplier/payout combo is really lucrative and enticing, but I already have 100 and I'm at the point where I don't really need the multiplier increase/donuts. If anything I would add it to the big ugly block of Walls (my Wall-Mart) to free up space and start storing other stuff.

Does this come back at the end of the event? Maybe I can procrastinate until the part where they put everything up for the "last chance" sale?