You should stop that because it's really the worst decision, to host copyrighted data on a computer that is connected to your home-network with your private IP.
If you go the way with a 99% stable mostly anonymous proxy with good bandwidth, you could invest in a home server. You should build it yourself. I suggest a microcase because you don't need gfx
But I still think it's a bad idea even with proxy because of the energy consumption. xD
Btw it is hard to find a proxy you need if it's not yours. =P