This will never work, you may aswell stick your money in a paper shredder. Anyone serious with high end gear can deposit for a demo wich is what you are pretty much offering. This business couldnt survive on long term rentals unless you had unlimited income and didnt care about a profit, and didnt mind the very high chance of damage. I admire the whole new idea process but how could you make money on small rentals on one piece of gear, multiply that several fold for your start up inventory and it would take years to break even, in the meantime you need to invest in current products to stay relevant and it gets even harder to justify. Maybe someone smarter then I can figure out a way this would work, but I cant see it.