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Take the leap!

I would also strongly encourage reading Tim Ferris' "4 Hour Work Week".

Best of luck :)

The price.

Whatever your profit margin is, you need to work out how much ACTUAL value of sales you need to generate to pay for it. Offices in todays market are definitely not a must

There are loads of companies that provide this service and you can rent card readers for them, however they are expensive.

You could do pretty much everything using paypal merchant services for...

Odesk is great.

I would also recommend:

People Per Hour
Elance
Guru
Fiverr
Freelancer