it really isn't too expensive I mean this CCTV system is the most expensive piece of equipment we would use.. I don't have a thermal Imaging camera I would love to but we are talking $5,000-$10,000 for 1 piece of equipment. Sometime fire departments will donate theirs when they upgrade but very rarely...
as far as other equipment goes I use EMF detectors, Digital voice recorders, various audio enhancing software, IR digital camcorders, Digital cameras and thats pretty much it.. aside from the small things, extra batteries, LED flashlights, first aid kits etc..
and its hard to charge for a service you cant fully prove 100% ya know? people offer us money and the only thing we would take would be gas money if we drove a LONG distance, no more. We just like to help people understand their situation OR help them realize their place isnt haunted and that they can relax.