Stop hatin on my dirty old garage floor!! Just kidding, you are correct. I may end up doing the whole garage, just not ready to commit right now.The whole garage done in the tiles would look even better! Glad you found something that worked for you. Sure this thread will help someone else out.
My husband went the epoxy route which wouldn't help out in this situation (and he does have SAS) but have to say having a really nice looking garage floor helps create the desire for a better looking garage space too. We added nice cabinets afterwards. Gives you garage pride. The tiles are much less work than the epoxy though if you DIY it.