You are now entering the dangerous territory of 'what next' 

indeed but we've got to stop house extensions for two reasons: we've run out of corners of the house to extend and we've run out of relatives inheritances to spend on such
Mrs K has got her mahoosive kitchen (25m
2 !) she's pined for all her life and she loves it
But what next indeed? I retired in 2012 and a mix of holidays, 2 extensions and issues with 3 aged relatives (all now brown bread) have kept us busy enough since then.
I could take up gardening but FFS it's a pastime best delegated. Nick will probably extol the virtues of lock keeping and cat sitting but the words no no NO! come to mind. A quadcopter?
Robbing banks then