Funny you say that, I made the move from 44" to 36" earlier this year on my tacky product and have been happy I did.
I found it to be a penny per square foot cheaper than the 44" with nearly no waste, which puts $10/roll back in my pocket right off the top.
Next, you have almost 55 sq ft of paper going UNUSED on a 44" roll (if you have a 42" printer like I do), which adds up to $5.78 per roll wasted.
Finally, there is a $35 difference in the cost of the rolls which unless you are going all the way out to 42" on every print, that is more waste. I've found that 95% of my prints (jerseys, logos, etc) all fit with no problem on the paper and that the 44" would yield a ton of waste.
Maybe you can find a show special on Beaver at NBM?