I also tried many different business ventures prior to carpet / upholstery and contract cleaning, none of which worked out for me, just lots of lost money along the way, really wished I had started sooner, as I feel this business is really taking off now, has taken me three years (not long) and has been well worth it.
Good luck to you, I am sure you will be up and running again in no time, you have the advantage of previous experience on your side.
Nigel.