I did a lot of homework on this during my 6 months trial life in Calis last winter, as you are finding out it's not easy to get it right!
Some basic (appx) facts: £65k equity less £5k relocation/settling in expenses = £60k to invest. At 9.5% net of tax this would provide just under £6k of annual income, remember you will have no access to this money because if you "dip in" to the pot your interest will be reduced. Top this up with hubby working full time at 1000tl & yourself part time at 500tl a month (average "blue collar" wage in Fethiye area according to my research) = £1,100 per month net income. Now take your living expenses out: rent, utilities, food, travel, etc. & it should leave you in the region of £200 per month for "pocket money".
Please don't take my figures for gospel, I have tried to approximate from experience where possible & the figures may vary, particularly with regard to income as we all know Turkey is often unstable throughout the winter season.
Imho this income is far too low to support your situation without putting yourself back to where you are today, the only exception being hubby is back "home" & happy + the kids should have a better quality of life compared to disrespectful Britain as it is today which I fully understand your desire to leave behind.
Keep throwing the questions at us, I'm sure someone will provide the "right" answer for you eventually.
PS: Please feel free to correct any mistakes with my figures, I worked it out on a calculator which I think Noah produced some years ago!