Anyone driven from SFO to Las Vegas? Googlemap says approx 9.5hrs. Will it be stressful for first time driver in States?
Alternatively can take a flight but that will set us US$130*4.
I'd strongly recommend flying. Here's the thing: that drive won't be stressful, but it will be HELLA BORING.
First and foremost, thanks for looking at Googlemaps before you posted. For anyone else reading this,
here's the map we're looking at.
So you can see that your route is basically from SF across to I-5, then south on I-5 to Bakersfield, then west on US-395 to I-15, then northwest on I-15 to Vegas.
I-5 is famously the most boring interstate in the world (though I've driven I-80 through Wyoming and let me tell you that's nothing special either). It's miles and miles of nothing but non-stop four-lane highway - no cities, nothing to break up the monotony. Bakersfield is a hole that's mostly famous for being one of the epicentres of the housing bubble five years ago. US-395 and I-15 are nothing but desert.
So really, that drive absolutely sucks. It'll get you from SF to LV, but you won't have any fun doing it. And if Googlemaps says nine hours nonstop driving, it'll be twelve hours once you factor in rest stops.
You've got two alternatives, both of which are better than that miserable-ass drive through Bakersfield.
If you can add a night in the middle, the first alternative is to go through Yosemite (the second route on that map). It's mind-bogglingly beautiful; you get to climb up to nearly 10,000 feet high as you summit the Tioga Pass; and you can take a quick side-trip to the unearthly bristlecone pine groves in the White Mountains. The only catch is that you have to spend a night in the middle - probably in the cute little town of Bishop - which will set you back a couple hundred, and it seems like cost is a consideration here. (But if you're trying to make a memory, this is definitely the way to go.)
Your second alternative is to suck it up and fly. This is probably the way to go - for $130 each, you get to cut your travel time from twelve hours to about three hours. You'll be a lot happier, it'll give you more time in Vegas, and you won't be mad at each other by the time you get there.