Get the track design and the pricing right and you will be fine.
Get it wrong and you will end up like all the others that have tried and failed.
You need to decide at the start if you are going to cater for racers or the general public as they are two very different groups.
I'd also go have a look at the other indoor track that's in Melbourne and do the exact opposite to what they are doing if you want to get people on the door.