That's a fair metric. For things like two week trips, this is what we do. We live in the South Bay, so Uber/Lyft typically runs $100+ each way with tip. We can get a lot of parking for $200. We also do some split airport (SFO/SJC) trips, and then we definitely use Uber/Lyft.
Cheers.
Yep, and shorter trips make a lot more cents when I figure in charging for free. I can usually top off the car on a short trip so that saves time and money and is a factor as well.