Earning a living from btc depends to an extent on the country you live in. THose from third world countries can earn their daily bread from signature campaigns, those from richer countries depend on mining, trading and selling good and services to make some reasonable income.
Not exactly. What would matter is if you have internet access....
yeah, it's one of the third world's problem, it's really common for them. even at big cities, or even the capital, internet status is not good, unstable, the international optical cable is break several times/year.