The shuttle bus takes about 10 minutes to get from ABQ to the rental car center. You may have to wait up to 10 minutes to catch the bus. You should just make it if the flight is on-time and you don't check a bag. If it looks like you'll just miss it, you can always call Ace and see if they'll hold the location open for a couple of minutes; I've never used Ace myself so I can't say if they will help you or not, but it can't hurt to ask.