That is what they pay for, hauling it in and out. But these are three systems I bought. I wouldn't use them all at the same show. I make $125 - $150 per night at the nightclub shows sun-fri. If I book a wedding or anything on Sat (my only day off otherwise) I charge $500 for 1-4 hours and then $100 per hour over 4. I probably do 25-30 a year. I recently did a wedding where the couple was so late starting and taking photos that I played for 1 1/2 hours for $400. And then they tipped me $50! (They booked a year ago under my old rate.) Let me tell you, the list of things I wouldn't do for $300 an hour is short!
I have a 14 foot trailer to haul the stuff. It's not too bad since I move it every day. Keeps you in shape, lol.