hi Aaron
Your idea of approaching producers/companies you work for i think is a fantastic idea. I dont know if u have bought the ste4adicam operators handbook, but in the one chapter, pg 327 it says that a operator has done that before with great success.
I dont know if the producers/companies there would be willing to invest in you/gear, but here a lot of people across the industry have managed to finance equipment that way, i know of a grip who got his first tracking vehicle that way, One of my closest friends is a sound recordist and he has managed to buy microphones, recorders etc. These purchases however have always been during a feature or about to start features,
I would definately go that route before getting a bank loan.
kindest regards
richard