If you think you can handle it, have your accountant prepare a cash-flow analysis to determine how much new business you'll need to make it worth your while. Then, consider a sublet or share to keep down up-front costs, or think about an office suite, which typically provides secretarial support, furniture, and Web connections.
Finally, be sure you really need an office. With virtual-office software and teleconferencing, clients don't have to know how small your firm really is. By Karen E. Klein