Transport options around NRG Stadium this Saturday?

Hey Houston concert vets, my wife is visiting from Austin to see Ed Sheeran this Saturday night, and although I can't come I'm trying to help her with logistics – I've been there for shows a few times over the years, but not super familiar. I want to get her a reasonable hotel room nearby for her and her sister, but concerned about getting back and forth. Specifically –

• How practical is it to get a Lyft/Uber after a sat night concert there?
• Should she just drive and park instead ($$$$)?
• Is walking around that late at night out of the question?

Any local advice appreciated, thanks!