Haha, went through exactly the same dilemma before. 4BR unit or duplex 3BR with roof terrace?
Ended up going for the 3BR duplex PH as living in a PH (though a cheap one!) is on my bucket list!
Plus the fact that the Mrs likes to have frequent house parties for friends and relatives so we felt that the roof terrace will be handy and not be wasted.
The RF we had however was manageable (ard 300-400sq feet) so I think it's the right size to make it a cosy outdoor space without having to break the bank!
树大必有枯枝,人多必有白痴。
树无皮必死无疑,人不要脸天下无敌!