Natasha Sorry to take so long to reply, but I've been busy.
Yes, 1998! So, to make sure I have this right, you lived in your council house on a secure tenancy from 1998 to 2015, meaning you would qualify for the £75k discount, if you could raise a mortgage.
You have now assigned your tenancy to your mum. Do I have that right? So you have lost your opportunity to buy the house at a discount.
You see, that doesn't seem like a shrewd business decision, as in effect you've lost out on £75k. So moving to the rented barn could be taken two ways:
a) You are earning enough so that £75k is nothing to you - I don't imagine that this applies to many people, even millionaires. 
b) You are not earning enough to get a mortgage. If the council house is worth, say, £200k, you would need a mortgage for £125k.
Therefore, perhaps moving to the barn isn't such a mad decision.
Either way, what you decide is fine for your life. I hope it makes you happy. But if you look at your figures and find things are not stacking up, it can't be right to keep enrolling people. Particularly people who don't have the "life's too short" attitude that you have.
You obviously work hard. Maybe it's time to face reality about FL?