Again, I can appreciate that. But a solar charger (or your alternator) would let you charge up a battery (or possibly directly power) and use a powered pump. It will hangs your life!
I had an 11' inflatable that I tried to use a foot pump on. It took almost 20 minutes, and I hurt afterwards (getting older and not exercising regularly is starting to catch up to me). With my electric pump, it took 5 minutes to fill all 3 chambers of my 8' and the only thing that was sore was my wrist from holding the inflator.