If your limit for essential protection is only $30, how will you afford to even play this game?
I dont know how old you are but... expect that is will NOT be cheap, and it's only common-sense to protect your eyes decently.
The mask part of the goggles can be removed in some models, or plain cut off in others.
Go to a local game, get age-verified at the same time, and see what folks use. Then you will know what to get.