Any idea how I find out how long it usually takes for the Alamo can rental shuttle to get from DTW to YQG?

I am flying into DTW but it looks like car rental rates are cheaper if I take the shuttle to to YQG. I'd like to know if the lower price is worth the shuttle trip-time.

I have sent email to Alamo but didn't receive a response and I can't find any information on their website.