Does Ottowa have a mill district? Like, an old, not fully operational mill district? Around here, a lot of the older mills & warehouses have become "studio spaces" for various artistic endeavors, sliced up and rented out not too dear. Make sure that the one you select is not going to renege if you go play music there. On the other hand, do select something slightly above the "and homeless folks are breaking in and living down the hall" level of cheap and decaying. You want a dry roof and reasonably secure.
Or, if there's an excess of office space, sometimes that can be had at reasonable cost, and if your hours and the office hours of the places around you don't overlap...or you go with the headphone/IEM practice setup...no problem.
In a market where all space is tight, it's just plain expensive, no two ways about it.