Check where a band actually lives before you compare two prices in the Illawarra. Sydney groups come down here happily and plenty of what you find online is exactly that, with an hour of the M1 quietly built into the figure in each direction. A band based between Thirroul and Shellharbour is quoting a local job, and on a late Saturday that difference is real money rather than a rounding error.
The coast and the escarpment do the rest of the deciding. Clifftop and beach ceremonies have nowhere to plug anything in, the southerly gets up off the water most afternoons and a speaker on a stand is the first thing it finds, and a stone or timber room up on the escarpment loses its heat after dark quickly enough to drag instruments out of tune. There is no review ranking to fall back on here, so ask each band how they have handled all three.
Top picks are the acts in this category in Wollongong, without a review, rating or premium ranking: all these sort keys are tied.
Usually, once the travel is on the page rather than hidden inside the number. A band driving from the north is paying for fuel, tolls and an hour each way after midnight, and that ends up in the quote whether or not it is itemised. Ask every shortlisted group where they are based and you can compare like for like in about two minutes.
How many players you book decides most of it, then the length of the night, then whether a ceremony somewhere else needs its own sound rig. A December Saturday is dearer than a Friday in June because everyone wants it. The starting prices next to each band here come live from their own listings, so read those and then ask what gear and lighting the figure includes.
Have a sheltered position picked out and tell the band where it is, because a stiff breeze in off the water takes a vocal apart under a perfectly clear sky. Ask what they carry for it and whether a short unplugged set is possible if the spot turns out to be exposed. A band that works this coast will have an answer ready.
Ask for recent live footage of that configuration rather than the band's best video, because a five piece clip tells you nothing about how the trio sounds in a room. Phone footage from a real reception with the sound up is worth more than a polished promotional cut. Two minutes of it tells you nearly everything you need.
A ceremony on sand or up on a headland usually has no power within a hundred metres. Bands that work this coast carry batteries as standard, so put the question in writing instead of finding out where the nearest power point is on the morning.
Most of these groups scale from a duo up to five or six, and a hundred guest reception in a club room does not need the top end. Ask for two figures in one email and let the band tell you which one suits the space.
At quarter to eleven with a full floor you have no bargaining position left at all. Agree the finish time and what an extra half hour costs while you are still signing, not while the crowd is waiting.