Urban drivers (like in NYC or SF) cover 100–140 miles because trips are short and traffic is dense.
I literally wrote "outside of a major metropolitan area", so try to keep up.
Suburban or mixed-area drivers often push 200–250 miles just to get enough rides.
One charge at night is enough.
250 miles is about 3.5 hours of highway driving at 70 MPH. That's also ignoring that at those speeds, you're not going to get the EPA range rating out of an EV. Sure, you might get lucky and have a day where no one wants to be driven to/from BFE and every fare you pick up is right near your last one, but the reality of Uber driving in places that are more spread out (like central FL) is that you're gonna burn through some serious miles if you're expecting to put in a full day's worth of work.
Again, I own an EV and have literally seen people doing it because I talked to them about it while I was stopped to charge. EVs are great for a lot of use cases, but driving around like a bat out of hell for 8 hours a day is not one of them, yet.