The best school is the one that you feel happiest learning from. Any school worth considering will be pleased to take time to talk with you. I'd take half a day and do the rounds.
If you are primarily looking to hire (rather than do a rating), make sure you look at the aeroplanes. Won't take long to get a feel for how the school treats them. Some schools bolster their hire list with cross hire aircraft, so look at what's actually out the front and available for everyday hire. A club (eg RVAC or PAC at Tyabb) may have a better selection for private hire, although MFS has an excellent fleet.
If you are doing trips with passengers, its better to have aircraft that present well and give your passengers confidence with an office that has a nice friendly environment for your friends to wait.
You might also like to consider a share in an aircraft. The Melb Aviation group has an Archer II and a 182T. From memory they have 38 shareholders at something like $12k per share. I think Brian Jones (
Brian Jones Aircraft Sales Centre, aircraft for sale.) is listing a 1/4 share of a Lance.
If you meet the minimum experience requirements, Mark Howe at Blue Demon has some Bonanza's and such like for hire.