Google Adwords is a self-serve way to market your business at whatever budget you can afford. It is a great way to start bringing traffic to your website without breaking the bank. (Though I have found out, that the more money you invest into it, the more it pays for itself).
To start, I used a small but sturdy Brother all-in-one for my printer/copier/scanner/fax and I recommend it. You save a lot of money (and space) from avoiding a big industrial copier (though there are times when I need to take larger jobs to FedEx Office), but the new Brothers can handle up to 50+ pages of automatic feed scanning and copying – which is worth its weight in gold! But, beware that toner costs more than you’d ever expect!
Pro: Less expensive
Con: Less control over atmosphere and location
I considered using a virtual office (and I still consider adding a virtual office in a second location), but after walking through many of them, I decided they weren’t going to be as available/accessible to many of my clients. I’m an immigration and bankruptcy lawyer, and I decided it would be more effective to be located in the Mission District and to be able to post a sign outside the window to attract walk-in customers. This would’ve been more difficult at a virtual office (which all seem to be in high rise or tall financial district buildings). That being said, I know other immigration attorneys who have successfully started their firms in virtual spaces, so I know it can be done. It is worth thinking about the atmosphere that you want your clients to feel when they meet you.