I'm about 5'5" and a solid 225. I've been riding a Giant Cypress hybrid. It was approx. $350 two years ago. It's been great for me to get used to riding again, it feels stable and comfortable but is responsive as I try for a little speed and power. The owner of my LBS (not where I bought it) said that it was a great bike for me when I asked him to check fit.

And I'm head over heels in love with riding.

And three cheers to you for leading the way for your friend.