Workplace in Changi

Therefore i have to rent a place in the East. Any to recommend?

I'm looking for:
1) One Room
2) HDB/Condo/House
3) Aircon + Internet
4) Furnished: Bed + Cupboard + Desk + Chair + Others
5) Pleasant Housemate/s
6) Kallang/MarineParade/Siglap/Bedok/Simei/Tampines
7) Preferably $400; $500 if it's an excellent place
...is it too much to ask?

Please let me know if you have recommendations.

If it's a nice place i don't mind a 1 year contract and if it's really good i don't mind considering 2 years.