DarkRP.createEntity("Money printer", {
    ent = "money_printer",
    model = "models/props_c17/consolebox01a.mdl",
    price = 1000,
    max = 2,
    cmd = "buymoneyprinter",
	customCheck = function(pl) return pl:Team() != TEAM_STAFF end
})


Just add the customcheck to the end of each printer/bitminer.