Tell your lady to get dressed up nicely but comfortably as well and dont give her an idea of where you'll be taking her. Since you dont have much cash to spend I'd screw around with her head a little get on a bus to pok fu lam get off anywhere and act as if you know where your going - then grab a cab and pass him a note (get one of your chinese friends to write it for you) ' Aberdeen, Jumbo Restaurant' only thing is on to of the restaurant is this romantic restaurant at night called 'Top Deck' there you can virtually eat just about anything from burgers to chinese, indian and so on - great menu. Prepare them in advance that you'll be bringing your lady and suprising her with her dinner. Then from there I'd head to Sahara in lower Elgin street for some scrumptious desserts and the ambiance is gorgeous! Which is where you give the birthday pressent ' complete box set of pampering from you to her including candels - ( you can make your own or buy a set, I can suggest later on if you like the idea. ) Topped with an invite back to yours or hers where you have pre decked out the bedroom with rose petals, candels ready to be lit and some sexy music.
Bus from Central to Pok Fu Lam around $7 per person
Cab to Aberdeen from Pok Fu Lam between $30 - 50
Dinner on Top Deck two mains, bottle of house wine and starter $600 - 800
Cab from Aberdeen to Central, Elgin St.around $60
2 Drinks and desert $150 and up
set the mood with box set www.newsensationshk.com various options there.
I'm a romantic so I did something similar for my fiance in April and he absolutely loved it!