Don't waste your time with Taipo, its not even remotely comparable to Sai Kung, weird that it was even specified. Seriously its chalk and cheese difference.
I think for your budget you will need to venture further down from Sai Kung along Tai Mong Tsai Road, you should be able to get a top floor village house, 3 bedroom, timber floor boards, 700 ft inc roof top, full width balcony and free parking. $8500 should just cover it.
These places were $5500 in 2005 lol so allowing for a bit of market adjustment from then till now, $8500K to $10K will cover a sea view, and a rear facing mountain view.
Try out the real estate agents next to Steamers bar in Sai Kung Town, they should have more than a few places for around that money, 10 mins drive from town.
Spend some time at a few of the cafes and restaurants in Sai Kung, you soon discover that there is a real community with its own flavour of atmosphere. Mostly dominated by the expats, but locals that are extroverted enough to partake in a good drink sesh and a loud convo about premiere league, and your in excellent company.