extra tom?

first off thank you guys for helping me, I've had questions and you guy have been extremely helpful and thank you.

Anyway, I'm getting a third mounted tom. I have 2 mounted tom's mounted onto the bass, the bass it self is like at an angle on my fight. How would mount the third one? I don't want it to wable too much, and I don't want to buy like one of those, 2 mount tom holders, like on Lars Ulrich new set. And I can't afford a drum rack in the slightest bit. Any ideas?