Currently we have deal from Canadian Home Depot - change empty metal 20lb to filled Lite Cylinder for $50.
Let's say - $15 for lp, so $35 is not so high from my point of view. But as result - less tonque weight and trust information...
I just not so sure that North Trail's tank holder compatible with it.
Upper side (around the valve) is about one inch wider...
But I think to try, and I'll post results here.