I was riding my Harley 883 to college a lot of days of the last semester. I carried my books in a large and heavy backpack, and had a smaller one with loose straps that I wore over the first--it had my lunch, water bottle, and knitting for between classes in it. I can easily see carrying a laptop, etc., while riding a smaller bike.
My dentist rides a Honda 250 to work and back--it's small and looks like a dirt bike. Says it gets 70 mpg, and he's had it up to 70mph on occasion.
My only concern would be that your Hubby realizes that while a motorcycle can be an awesome way to save gas, when the roads are the least bit wet the bike can slide easily. A tiny bit of moisture on the pavement in a curve can be serious, and if another driver gets stupid trying to perform evasive maneuvers may prove impossible. While I am comfortable with my skills in driving on wet roads, the skills of other drivers concern me enough that I take the car in inclement weather.