The list of works sound like a mix of some things that should be attended to with some urgency and other things that should be done but can be part of a staged program of works. Eg, nobody will die if interior painting is not done immediately. So, why not have a series of levies anticipated for every quarter over a couple of years to enable all the works to be done without such a large levy increase.
If this were the ACT, it would be an ordinary resolution to amend the sinking fund plan to change the schedule of anticipated levies and to add these various works to the planned maintenance over the next several years, certain safety matters immediately, other items next year, the least urgent in year 3.