i'm nearly a full year in now.
for the first 3 months I was doing around 3 jobs a week, making about £600/month after all outgoings. it was literally 1 or 2 carpets on every booking.
a lot of guys don't like saying what they earn, but im new so its all good...right now i'm making about £1300 month after all outgoings, but that is still by spending a considerable amount of time leafleting, facebook postings, link building for my website, and doing some crappy jobs sometimes that I would rather like to be in a position to be able to refuse. I don't tally up every hour, but id say its a 50hr/week at the moment, when including my time at jobs, travel to and from, admin & leafleting. So no, its not easy money, especially in the beginning. I'm still classed at the beginning, and reckon it will be another year like this if not more.
take from that what you will, but it still beats office work in my eyes which I had been doing for years, and even if I only ever was able to get it up to £1500/pm, id be content, however I am aiming higher, who knows...
The thing that has been difficult is the risk taking, I spent around £7000 on van/insurance/machines/solutions/website etc, if you are to do it, I would suggest buying your equiptment second hand, make sure it is the right equiptment for the job, all vacuum cleaners are not one and the same, nor are carpet cleaning machines, and i'd suggest doing the work around your regular job to see if you actually like/can cope with it, its not just stamina and cleaning skills you need, it is a very customer focused job, and you need to be good with sales to be able to close deals & leads with your customers, and also good at admin for sceduelling, and web design/SEO unless you are outsourcing that to someone else.
good luck.