The price for an endorsment is about the same here as in Canada. If you wanted to work in Canada they would have you on the docks for at least one season, then a slow start flying on the second. Full on in the third season.
Canada is for the majority seasonal work.
Here in Aus, it is not Seasonal work, the pay is usually better than other single engine jobs. There is work around, good float drivers are hard to find. Not sure where you are but sounds like you might be in sydney, if so go down to the seaplane base and have a talk with some of the guys, you just never know
good luck!