Hi, I'm very familiar with Singapore, so I can help you to identify serviced apartments in Singapore that meet your requirement.
To get "One bedroom serviced apartment" at "approx 3500 SGD / month" is feasible -
and I'll contact the serviced apartment companies to confirm if their terms and conditions can fulfill your 3rd criteria of "Minimum one month rental okay", as I know some of them require minimum 3 months tenancy.
Would be best if you could provide the 2 key info below upon project awarding, so that I can source the best available options for you:
Info #1: Your Work Location
This is for me to identify apartment location that is convenient for you; Additionally, some serviced apartment companies offer more than one location within Singapore, so I can recommend the best option.
For example, if your work location is at the South of Singapore (such as Marina Bay or Tanjong Pagar), then it is not appropriate for me to include one apartment at Jurong East in the list.
Info #2: Your Transportation Mode
Kindly let me know whether you will be driving vehicle when in Singapore, or you plan to take public transport such as taxi/cab or MRT (Mass Rapid Transit) etc for daily commute.
If you plan to take MRT train, then I'll try to identify apartments that are nearby MRT station for your convenience.
Please refer the employers' feedback on my profile, while my 5.0 reputation on this website is assurance of quality work.
Look forward to favorable reply from you. Thanks!