Are you serious about making money? I have a sure fire idea. Hear me out:

My voice is low and my vocal range deficient. If you - any one of you or even a consortium - never fear, there will be money enough for all - figures out how to design a reasonably comfortable capo large enough to be applied to my throat, complete with instructions, I'm your man, so to speak. There is money to be made. Mind you, it will have to be guaranteed. No fool, me.