Looks far too good to break.
How about selling the 620 ti gearbox for the most you can get. Buying a standard gearbox, for £50.00 (seen them go for that) ask ZRed site trader, might still have one.
Put the balance to get it swapped over, put in a new clutch, but then you need to keep it and enjoy it.
They are not fetching a great deal of money at the moment.
Or take the rose tinted glasses off and take the money and cut your losses.
House moves can swallow money, good luck with the move and whatever you do with the car.
