First up, get at least three quotes for the exact same work, that way you'll have some sort of idea of whether this one is dear, cheap, or otherwise.
This is Australia. Labour is expensive in Australia. The type of work that you need done is labour intensive.
To put it into perspective you have to ask yourself "How much is my time worth?" For whatever it is that you do for a living.
For the type of work you need done, there is only a small percentage of the population able to do it, and qualified to do it. Hence the expense.![]()
Good luck![]()