I owned 2 19 foot Roadtreks ("190's") before the Tiger. Great vehicles, with almost everything most C's have, just less empty volume. It's a full 'Class B RV'. At a nominal 17 feet (probably tapes out at closer to 18'), she can park it almost anywhere other than a parking garage. The Chevy chassis will almost surely be reliable, and fine-driving.
The only two serious grips I had with my '01/'02 C190P was lack of ground clearance and a too-low dump exit. They're cured at least some of the first, and if she got a macerator pump, she'll be free of the second one.
I even parallel parked mine several time, in a normal space. I'd suggest adding a good backup camera, mounted high up and pointing down to barely include the rear bumper. Probably also some good fisheye stick-on mirrors.
I'd also recommend getting her onto the Class B Forum here. Lots of good info & answers to questions can be had there.
Jim, "This beer tastes like I'm not going to work tomorrow."