You are eligible to purchase a HDB flat in the open, if you are PR. However, please do note that you are require to dispose off any pte properties in Singapore and overseas properties that you owned within 6 months upon purchasing a HDB flat.
Feel free to drop me an email or contact me for further queries.
You can buy resale hdb flats. You can't apply for HDB loan as requirements is at least 1 is SC.
I will be glad to help you search a unit and i can intro a banker to help acess your financial needs.