Tbh it sounds to me as if your plan has two parts to it. You want a change of lifestyle, because your commute is currently getting to you and you want to move somewhere where you won?t be rushing around all the time and won?t have to commute for x hours a day, so you want to move to devon to get that change of lifestyle. But to do that you also need to do something to bring in an income, and as you?ve seen a house with business premises, you feel that setting up your own business would be the way to go.
I can absolutely see why you would want a change of lifestyle. However, are there not easier ways of doing it than selling up and moving to another town where both you and your dh would have to change jobs, your dd would have to change schools and you wouldn?t even have any guarantees that a business venture would succeed? If you want to set up your own business can you not do it in the town you?re currently living in? the house that you?re currently looking at s already on the market, I?m assuming yours isn?t? so there are no guarantees that you?ll even get that house, it could take you 6 months to sell yours by which time that one might be gone and you?ll end up having to rent business premises anyway. And what about your dh? I?m assuming he is working as well? So are you expecting him to quit his job and to find another one in Devon? How can you be sure he?ll be able to find the kind of work in Devon that he does in your current town?
I think you are potentially putting a lot at steak for something that will not give you any kind of income for a considerable amount of time.
If you want to move to Devon, and you want to be self employed, then rather than looking to start up a business from scratch, I would look to buy an already established business that you could take over. That way the hard work has already been done iykwim. If you really want to start your own business, then I would look to start one in the place you already live in. That way your dh will still retain his job, your dd won?t be uprooted just yet, and if it doesn?t work out, you can give it up and find another job in a place where you already know how easy/difficult it is to find employment.
I really don?t want to rain on your parade, but it seems to me that you?re planning to uproot your whole family for what is essentially a dream, and while the prospect of owning your own company is very exciting, believe me I?ve considered it myself on many occasions, it is exceptionally hard work, there are no financial benefits for a considerable amount of time, and there are absolutely no guarantees that it will even succeed. If you think commuting is stressful, then quadruple the stress and you will come close to what it?s like running your own business. And when it?s your own business you can?t leave it behind when you go home, because it?s yours and you take all the flack for the things that go wrong, especially when the business is in the same place as your house, you really will never escape from it.
Think very carefully about what you want to do, discuss it with your dh and see what he says as well, because you?re in this together, he has to be 100% happy with the idea as well.