I went through this with my last company. Several 135/management companies swore that we would make a profit. I did the numbers and they just didn't add up so I asked the 135 company to guarantee us "X" amount of profit per month. Of course they wouldn't. So my company could see right there that the 135 company was full of it. What I have found over the years is that when your company starts asking about ways to off-set their costs on the airplane they probably can't afford it, and they either sell the aircraft outright or move down to something less costly. I am not saying this is your situation, but this is how it has always panned out for me. Hopefully you will find a plan that will work.