Casual PE - is it feasible

With such constraints, I would spend the whole time jelqing, instead than doing the bathmate. 40 minutes jelqing per week is not enough, jelqing 3-4 times per week 20-30 minutes can give some gains instead. Just my 2 cents.

If you look at the newbie routine, it only adds up to 25 minutes 2 out of 3 days. Maybe stick to it and see if you get gains?
Newbie Penis Enlargement Routine

Possibly manual stretching only with your hand may give you the most bang for the least time investment. Bennett8 made good gains with a minimalist routine:
2-inch Growth Comparative Pictures

If you do some searches you will come across many threads where people mention the power of doing less PE instead of more. I am pretty sure even the newbie routine has been scaled back from what it once was, timewise..

Edit: I just read Marinera’s post and concur with the pumping part being a big time-drain.

When I saw this thread, I was immediately reminded of these threads on gaining with minimal routines:

Amazement!
Are my gains from the stretching, jelqing, or both?
Already Grew With Worst Routine Ever

And also thought about Bed Fowfers, as described by Big Girtha:

Don’t Measure it, Weigh it.