School me on Chromebook

Wife needs something for doing her QuickBooks and stuff on for her business. Her QB is web based so the laptop basically requiring full-time internet isn't a problem.
Thin/light is the name of the game as well as price.

So, tell me about different Chromebooks and/or other recommendations for $300-$400 or less.

the acer r11 are working out great at my work. you can them for around $300US for 11.6" or $350+ for 13"

I have the HP X360 11" Chromebook and it's great. Doubles as an Android tablet also with the Google Play store. If you're looking for a good bang buck deal, the C203 from Asus just got replaced with a new model, so you might be able to find one of those sub $300 in closeouts.