Your father gets mad at you for your "frivolous lifestyle"—you spend too much on travel or booze or fancy dinners. YOU SHOULD BE SAVING FOR A HOUSE—or as Grampa Simpson once suggested, "new storm windows"—not enjoying the limited free time you have in this stupid life where all we do is work and sleep.
It's a generational thing, so you're never going to win. His generation didn't have the lust for travel that ours does. His generation still thinks that you should be BUYING PROPERTY IMMEDIATELY, ignoring the fact that buying a house or apartment in any major US city is nearly impossible unless you're an investment banker.
Since you'll never convince him that living a life that looks different than the one he lived isn't "frivolous" as much as it's just "different," you might as well just keep pissing him off. Book that trip. Buy something ridiculous, like an iPhone case that costs almost $100. Allow us to suggest this one from Native Union. Crafted out of fine leather that will patina well as you knock your phone around, and it comes with a stripey charging cable so you'll never get yours confused with someone else's. Sorry, dad.