Symphony Bay consist of Villa Rhapsody and Villa Concerto which are across the road from each other. The Wellcome in LS is not as large as the one in Sunshine City, but it is good enough for the basics. Much less crowded though..maybe because it is a bit out of the way from MOS, mainly serves the LS, Monte Vista & Lee On Estate population, and there is limited parking in LS. There is also a 24 hr McDonald, Park n shop, and a small wet market in Lee On Estate which is next door to LS.
We have also lived in Shatin for many years. The rental in MOS/WKS is more affordable than Shatin, and the surrounding area is a lot greener, eg. Starfish Bay, Whitehead, Garden Farm golf driving range, and of course Sai Kung is only a 15 mins drive away. Not sure how large an apartment for $10,000...a quick check on the real estate websites will give a good idea.