^ Why don't you cut your labor and ref the "mobile" game yourself?
The local I was discussing hasn't had a regular ref staff in years. Often times we have a couple of guys that play/ref there that get pulled IF things get busy enough to need them. That proves a bit difficult if you don't have people willing....
For the groups that I bring to field, we ref ourselves, so to speak. It's very rare that we have need of an extra ref. It is of note that 95% of the players I come with are all 'old school' and very experienced....still doesn't mean I don't yell at them for masks and bags a few times a day.