Since moving up to Lincoln (Calendar years): -
Y1 - £32,217, £7,800 wage, £3,632 net profit before tax
Y2 - £59,948, £10,917 wage, £13,331 net profit before tax (1 employee taken on at the end of the year)
Y3 - £139,380, £17,847 wage, £52,426 net profit before tax (2 employees, 1 taken on at the end of the year)
Bear in mind that the year 3 figures and the last quarter of year 2 figures I was employing other people. I take next to no wage myself (up to the NI threshold) and pay myself share dividends from profits and buy vans etc to grow the business.
As others have said, if you want to remain a one man band you will reach a ceiling where you physically can't do any more in a week.
Also bear in mind that we built up a reputation in Hampshire for 3 years before moving up here. Not sure how much that has really helped us in Lincoln though as we really had to start all over again. Only difference is we had a good chunk of tools already in our possession.
Biggest difference between Y2 and Y3 - charging a proper markup on everything we supply. It goes straight into the profit line.