Sell it M8, simple as.
i just told someone off here earlier today my priorities.
1st Familly, 2nd work and lastly 3rd the car.
with out either of the 1st 2 the 3rd wouldnt be possible (for me anyway)
Sounds like the house is just what you need for both Familly and work so just go for it
Best of luck with the decision M8.