15 years
A couple of years ago we had sprinklers installed in one building (3 storeys, 9 rooms) and it was equal to almost your whole renovation budget - except in aussie dollars (1.00AUD ~ 0.94CAD).
It's an expensive process here because plans need to be submitted to council, approved, a licensed installer needs to be used, blah blah. It even has to be tested weekly here to comply with council regulations. Quite a pain, but I sleep easy knowing it's a good system and it's functional.
I'd try and do everything by the book, but maybe deal with the plumbers, electricians etc yourself. Try and do as much as possible without the architects being involved.
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