Well what's your budget?
Are you considering an apartment near MTR stations? What about Tsuen Wan?
You can rent something of good size and very affordable in South Lantau. Try HomeSolutions. Good luck!
Get on the lrt from tuen Mun to lam tei. Get off at every village and go to the agencies. You will find many village houses, 700 feet, often with roof, walk to lrt for 5-7k given how many times I've posted this info I still shake my head when I see people gibbering about bloody fanling or south lantau for fs sake.
there are many benefits to living in fanling/shueng shui as oppose to living in Tuen Mun, in fact, it seems to be slightly more popular choice than Tuen Mun, btw, how often do find any types of modern accommodations WITHOUT any roofs?