Hi Donna,
Our company is a family run business, and your question is very similar to the one that we were asking ourselves when we first founded.
Both my wife and I were working full time for an employer, and it all started with Michelle taking some holiday cleans on weekends to earn some extra cash, we sooned realised that this was a good business opportunity, and after talking about it for nearly a year took the plunge.
We visited business link, who gaves us some good advice, and went to the bank with a business plan. Michelle handed in her notice, and at the time we only had 6 regular customers. Obviously, our business account, had a loan for set up costs, van, letterheads, business cards, cleaning equipment, iniforms, advertising etc, and a whopping great overdraft to cover her loss of earnings at the start. The cost of the loan was more than she actually had as income at that time, I can remember us both thinking what the hell have we done

.
For the following year and a bit, I worked full time, and on evenings and weekends did all of the paper side and advertisng side of the business, whilst Michelle and her team of staff cracked on with all the labour intensive stuff. At the moment we have approx 100 customer accounts, some large, some tiny, and seven extra staff all working on a part time basis..
After nearly two years of business I am now taking the plunge and joining the business full time, as planned within our five year busines plan. However, it is still very scary, but you must think positive.
Obviously you have some selling experience which will certainly help your company start off on the right foot. My main piece of advice to you is that if you are going to do this, do not try and cut corners, IMO it has to be all of nothing.
Planning is the future of your success, no business plan, and you company will struggle before you even get started. Hopefully, this helps answer your question, "is it feasible", well yes, we did it, so can you...

Good luck
Kind regards
Paul