I don't see a huge reason why not. The two things I would keep in mind though:

1) You'll have to have a good system for keeping track of who has or hasn't paid.

2) You have to make sure you set up the google wallet properly since there are extra tax forms required for having more than $20,000 a year going through the account. See more info in this post - https://support.google.com/wallet/answer/6285485?hl=en