Good luck to you mate.
I gave up a £400 a week job so that I could be with my young son and have holidays when I felt like it. I struggled for two years but came good in the third year once I got a good following of customers. Have you considered a refresher course to bring you up to speed with new technology such as microsplitters?
Just to give you an idea of my prices:
Min charge; £50.00 upto 20m2 (Inc. h/s/l)
Through lounge/diner: £65.00
Double bedrooms £30.00
Small bedrooms £15.00
Bathrooms £10-£15
3 Piece suite from £125.00 (4 hours work)
10 cushion reversible £150+
I hope this helps
Regards
Neo