Yeah...about $30 - $40 per game and over a 20 game season it's....$600 - $800 B.F.D.
You would probably cut down available ice time by 1/3 over the course of a day.
So it's much more of a cash loss than you're estimating.
I'll go and try to rent 6 minutes of ice time and I'll let you know if it's more than $40. . . . D-I should be playing that at least.
So at the majority of rinks where the net comes off it's mooring at least a couple times a period, play stops, change lines, line them up for a face off, drop the puck then wouldn't it make economic sense under the "6 minutes per game is too expensive" for this rinks to spend a couple hundred dollars to install a reasonable anchoring device?