Option 1: Ottawa/Quebec City $600. Lots of historical touring and a live performance outside. Possibly attend some Music Fest Nationals to check out the best high school bands in Canada.
Option 2: Toronto/Trills and Thrills Wonderland $500. See a Musical/Symphony/Concert and perform at the Trills and Thrills Competition and go to Canada's Wonderland.
Option 3: Montreal. $550ish. Symphony/Perform Outside.
Option 4: Band Camp up North. Workshops and Fun. Leadership activities and guest workshop teachers. Cost unknown.
Option 5: No trip this year and a really really big trip next year in Canada. (Expensive enough that you would need this year to save for it).