Serious question guys.......
As you are aware I w/c with hubby on his commercial properties only and do downstairs traditionally as we dont have a second mobile unit.
I am in the process of a rather vigorous marketing campaign to increase our commercial ratios and, if all goes well will have to increase the amount of work I do with him - Huff  

I want to use wfp and just wanted to know if you think an enclosed backpack on a modified sack trolley would work for me in terms of weight etc.  How long would it last before refilling is needed. ?
My darling Brother-in-law will modify it so its looks ok for commercial customers and incorporate  a holder for my small, downstairs pole.
Would it be practical for commercial and for me to pull.  ?
I cannot pull a full 50ltr  Omnitrolley sodont suggest buying one of them or anything similar - just too much for me.  

Thanks in anticipation of your replies,
Sarah