Oh Lizzy, that sounds like a real predicament... I wouldn't know what to suggest.
I am afraid I am in a similar situation.. I never envisaged running a ironing service, it was a stop gap and financial income whilst I worked on building up my painting based income but the last few years paid its price on my 'dreams' and I have to accept whilst it will always be my passion, I might simple not have what it takes to push it as a career.
I am researching my options as best I can. Last year was a key year in my 5 yr plan for getting things off the ground and I invested what available capital I had in self promotion and getting work ready for exhibiting. (it was so bad at home I have had to write last year off and start it again)
Last few years were the worst years of my life personally, it makes me feel physically sick to remember some of it, but I now can't afford to start again and sadly I got into debt with spending on nice things for me and the DC's to try and make life better. (wrong thing to do in hindsight but I was so desperately unhappy). I am a little out of my depth really but so want to improve things for the DC's.
Sorry.. my rant there . I get very scared about being trapped in this place much longer but so much energy goes into the DC's, the business that I do have and tying to get into a better place mentally that sometimes there just isn't anything left.
That wasn't supposed to be about me Lizzy. I am sorry for hijacking, but your situation resonates with my own in some ways.
Without being egotistical, I get angry with myself because I am not completely stupid and yet remain stuck.