I'm really nervous about getting an office myself. I see the need for one, though. Right now I'm working out of my basement which has no outside door to it.. Customers come to the front door of the house and I have to take them through the hall and downstairs. I see a storefront as the future of my business. Right now, to be honest, I'm pretty scared to even move the business out of the basement. I fear it'd be a mistake and I'd loose money not make more money.
Fear is an important emotion, it keeps us aware of things around us, it makes us consider the many "what if" situations, it makes us think about whats the worst that might happen. Don't feel weak because you have fear of failure, everyone has it. People who claim to be fearless are either fools or liars.
At the same time don't let fear cripple you. Its a natural reaction to pull away or avoid something because of fear. You have to face fear, but in a logical way. Evaluate your situation. Crunch numbers, think about the negatives, but remember that most of the people in shops or offices around you went through the same feelings and fears as you did.
When I signed my lease in 1995 I remember EXACTLY the moment I left the landlords office, I was driving back home and my heart suddenly started racing and I got tunnel vision.
I JUST SIGNED A 12 MONTH LEASE ON A STORE AND I HAVE NO F-CKING IDEA IF I CAN HANDLE IT !
I had forgotten that I ran all the "what ifs", I had crunched the numbers, I had looked at worst case scenarios. Even if I failed it would not be the end of the world for me. Sure, I would lose a nice chunk of money and it would be panful for a while and maybe even embarrassing, but I was willing to take those risks. That's why I signed the lease, but at that moment I had forgotten all that. Later on I had to sit down and remember all of the planning I had done, but I was still afraid.
I am still here 18 years later, running my little happy store. Running a store or office, some people fail, some win, you wont know unless you go for it. But you must do it logically, plan everything, ask yourself every question and think about what would happen if you were to fail. If you can rationalize the reasons and benefits of getting a store (or even just an office) then you should go for it.
Be careful, be a little afraid, but don't let fear stop you if you can take the risk and the risk seems worth it.