I don't think it's unreasonable. I just got my bike back after over a year without (long story. But I took my bike to work and rode it home Friday. 26.2 miles. Then I got up saturday morning and rode it to work to pick my car up. Nice thing is there is a shower at work so I plan on doing a commute one day this week that is there and back on the bike. This should be a lot of fun considering how out of shape I am. It took about 1:40 both times.
My only concern is leaving for work in the morning while it is still dark