Take on too much work, run yourself into the ground and burn out trying to achieve it all within the duration you set. Customers start complaining over the following months you're behind and start looking elsewhere.
One thing you can guarantee is that really good work that likes prompt, regular cleans will leave and look elsewhere whilst the lowest priced work you have will remain with you forever and a day as they realise they have a bargain at them prices.
I would rather have a round I can easily get around on time that I enjoy, than run myself like a busy fool trying to over do it, keep losing good work and replacing it over and over. Just a nice trickle of selective work coming in to replace lost work from natural causes, moving, selling up, the usual stuff.