You will find there are two kinds of strata management agreements – one that is apparently low cost but with lots of “Schedule B” charges that can trap the unwary. If you think you might be consulting the strata manager every day or have a resident who is likely to do so, this is not for you.
The other kind is an all-in charge which covers all possible eventualities. If you are only likely to contact the strata manager once a year around AGM time, this is not the best use of your funds.
It sounds like you have found one of the former type. Ring around and see if there is anyone doing the latter and see which is more likely to suit your needs.