in my opinion...
to risk 20$ is not a big deal...i have rent some shares here
http://bit-miner.com/front/pricing.html?lang=enive ordered 3 shares (21$) of 400Ghps Jupiter, and each share is 0.1Mhps (100Mhps) for 1 year (= 300 Mhps my share)
with some calculations, i ill get back aprox. 90$ in 1 year.
if this is promising i will invest 50$ and keep 40$ in my wallet
after that i will keep the same routine, raising my investments, if the thing will be goin good
I live in greece, so is hard for me to get some Asic Miners, and is expensive to make a good mining rig....