I have been doing this for over 30 years and I make a very good living from it. As many on here know, I am not your typical DJ. I operate a FOH Rig. I recently started doing some lighting and personally find it a pain in the arse. It is more time consuming than the Sound itself. Everything else I do, Sound Rentals is directly Sound related. I used to subcontract the lighting to a buddy of mine. I agree there is money in Lighting and other things. Hell, just before Christmas I added over $2,000.00 in lighting and have made that investment back and more by the end of the Holiday Season
To me when one has to do all these other non DJ services it is may be due to inadequacies in the DJ area itself. Another thing is, those folks should not complain if Florists, Hotels etc start offering DJ services on the cheap. Some already think we are not worth much anyway.