I can totally see where you are going with this and in my dream world I would love to give up the day job at the nail bar and put my whole heart into building my own business. BUT - I am a single mum, with a morgage which still has the ex's name on it. I am wanting to get the house in my name only (which was agreed in mediation 4 years ago but to this day has still not happened), and to do this I need to have a regular income. I am currently turning the extension part of my dining room into a home salon, am spending more and more on my credit card in order to do it. I am prepared to work every evening and weekend on building up a client base. I just CAN'T give up the day job until I have some regular clients. My home is very much in need of being updated, due to the property part of the divorce taking over 5 years, and all this time I've felt why should I spend the little money I have on a house for "him" to get the financial benefit? Therefore it's going to cost lots of time and money to make it acceptable for clients to come into. I've already spent lots of money on training and products, and I fully intend to do more training.
I am lucky that I have a supportive boyfriend, but we don't live together, and I don't have the luxury of another income in the household to keep the roof over our heads. I am sure many others are in this situation, I'm not moaning, I'm simply saying that if I could give up the day job I would, but I have no savings, no other income, and my children need the support and security of their home right now (both hoping to start college September). If it took even just 6 months to build up a strong client base (I'm sure it'll be lots more in this current climate) then with no other income that'd be the home gone that I've struggled so hard for the last 5 years to keep.
What I'm trying so badly to say, is that where possible, I believe what you are saying is truly the best way to start a business, but it's not always possible.