A lot more than £300 thats for sure
But I agree with Ebonycossie4x4 - in that example, then sure you are better off not having £50k, but owing a £250k house outright....
But on the other hand, if you have a mortgage (like many/most) that is easily manageable (monthly payments offset against monthly income) then there's not a whole lot of "real time" difference - cept the other person has £50k stashed away to play with - should they fancy a nice car, a long holiday, etc etc.....
Since most of us will be paying off a mortgage for a good percentage of our life, I don't really see a mortgage as a debt, as such. Credit card balance = debt. Overdraft = debt. Personal loan = debt. A mortgage is pretty much something all of us have to do, so it's not really a debt as such, although yes it is in the technical definition...
Lol...