@dianae, welcome to Canada 
. Please donāt call Canadian pet parents āclientsā, as this encourages polite folks to take employer mindset 
.
Not sure of your origin country. Or broader travel plans. We find that traditional travel insurance is pointless for extended housesitting - as most related coverage relates to start/end travel rather than any coverage during visit. That said, we always have emergency medical insurance. We use two different services, depending on continent of destination. In case useful, we find that Genki offers a usefully flexible duration emergency medical insurance policy - pay by-the-month (stop when want) with broad coverage options World-ExUS or World-IncUS.
Hope enjoy your adventures.