I love short commutes, ideally biking or walking. Personally I would take a meaningful income hit to maintain a short and low stress commute.
For the numbers you are putting out there (about 40 extra minutes of commuting each day given 20 minutes each way) :
40 min/d x 5 days/week x 48 weeks/year = 9600 mins, or 160 extra hours worked each year commuting.
$50,000 / 160 = $312.50 per hour, so it may actually be worth considering. That of course is not factoring in the cost of operating your vehicle, and only you know how much worse commuting would be in terms of a drain on you versus adding extra income by taking on extra hours.