I do not see my country as an edifice constructed to impress other people. We do not need palaces. 
Canadians maybe generous to other people in need but our financial reputation is that of a tight-fisted miser who understands the value of a coin.  Example-American joke: Q. What's the difference between a Canoe and a Canadian? A. Canoes tip.
So, how about we skip the castle and estate and build a sensible high-rise in Ottawa that we can rent to the sitting Government members? We have make one floor for state dinners. 
We can also build one for the opposition. Heck, we can even buy out a Super 8  forth the remaining parties.
That'll save us the problem of the opulent housing expense submissions and constantly remind MP's of whose money they are spending. It will be like one of those offshore boats full of Indian programmers docked in LA except our will be full of MPs who are ' just visiting'.
Honest enough for you?