I think that trying to build a business while working full-time for someone else is very difficult. You'll be hungrier for the work when you don't have the safety net of full-time employment. That said, you will need some capital behind you. Keep your overheads low, cut back on your social life in the short term to save money, work will come from word of mouth...it all takes time. Find a good business networking group (one that has other tradesmen), join some clubs (football, rugby etc). It helps if you have children as you meet other parents - everyone needs a plumber! (but don't have children just to fulfill your business plan). Everytime you meet someone for the first time is a sales opportunity......let everyone know what you do. Good luck.