Hi supreme clean, and Mike, I have been carpet cleaning for 40 years and have made a pretty good living, but unfortunately not enough to pay vast amounts into a pension, So consequently at the ripe old age of 72 I am still working but may I say still enjoying it, and will continue as long as the body holds up, As for whether you should take up carpet cleaning? Yes add it to your window cleaning but for god's sake stick to carpets leave upholstery alone it can be a minefield, also it is important to not only have public liability insurance which is a legal requirement but you will also need product liability for the item you are working on should things go tits up, And as a footnote keep your charges reasonable as you in that respect are a new boy on the block, if you get a taste for carpet cleaning and want to further your experience there are many training courses you can take to improve your knnowledge pricing and profits, good luck, regards Ted