There are some questions that you have to put to yourself:
1. What is the budget that you dispose of ?
2. Your current job requires a suit?
3. How do you feel in a jacket and tie, plus leather soled shoes?
Aside the case in which you suddenly dispose of a great quantity of money (lottery, inheritance, etc), a wardrobe change will cost you, so a certain amount of planning is necessary! Even with e-bay, sales, etc, you will need some budget to do that, and if you are a...