it will probably be quite shit but tpg offer that sort of service for 300$ per month (though they have a 5k installation charge )
My experience with TPG-by-friend is that they're wonderful until you need support. My personal experienc with Optus is that they obscure their help services, they have no tools for techies in small-medium businesses, they obscure their billing, they outsource support to terrible staff (last guy I had refused to even say anything), they have intentionally misleading marketing... and ugly corporate colours :)
I'm also not sure that fibre comes to the building (we're in an old building in the CBD) and assumed a high connection charge if it didn't... and we're only a dozen or so in the office. It's just that we have a couple of video editors, and when they upload, everyone moans...
Our office in the heart of SF has 100/100Mb (admittedly, 'selected buildings only') for $50/month.
And this is just after us receiving an new government which scuttled the NBN that might have given us comparable service in 1-2 decades time. We're going to have expensive, slow internet for a long time.