We are in a 'make hay while the sun shines,' business, but when the sun isn't shining you fill your diary with whatever you can get and be flexible with your prices according to the market, rather than doggedly sticking to your prices when your competitors have read the market better and responded. You also have to work hard to NOT to make money given the coppers it costs to clean a carpet, so to be looking at empty diary pages and turning your nose up at jobs because you charge three times that much is bonkers. That doesn't mean you should charge rock bottom prices during a quiet spell, but you do need to be flexible enough to keep the till ringing because you never know when, or if, things will pick up. What's the saying, 'Pride comes before a fall!'
Simon