I like that, I use 35 with the backpack and 45 with the 10hp pushblower but I REALLY like your 2 hour min and yes you absolutely MUST get a dump fee if you're hauling even IF you can dump for free you need to charge for this time.
As for me, I *HATE* hauling because it goes on MY own lot so I do everything I can think of to get out of it. Some thing that work are chopping the leaves with the Wb thou few will go for this, some will (it isn't good for the lawn), with others I see if there's a spot in the back or over the side, some wooded area or anyplace else I can start a compost pile, grins. It's to the point I'll come back after the cleanup and dump a bag or two of Lime on their pile at cost to help it decompose just so I don't have to haul them.
Whatever you do, NEVER bag the leaves lol, I always get one request or so here and there asking me (or telling me) can I just bag them in garbage bags - This is not cost-effective, it's bs, it takes forever and if you charge by the hour it's STILL bs lol.