You can consider transferring your HDB to one name, and use the other name to buy an investment property, hence avoiding the ABSD.

Even though HDB requires a reason like "change in family structure" etc, my wife and I didn't face any issue doing the transfer.

Some property agents and bank loan RMs are pretty knowledgeable about this. Ask them.

For peace of mind, you may also engage a lawyer to craft an agreement on the ownership / sharing of the properties.

However, note also that the ABSD may be scrapped pretty soon, so your efforts in doing the transfer may go to waste.

Read up on the HDB transfer process here:
http://www.hdb.gov.sg/cs/Satellite?c...ermode=preview

Good luck!