This remark suggests to me it probably
wouldn't be wise to pay off this 2.6% interest loan because it could leave the extended family too vulnerable to an emergency, forcing a sale of your father's home.
It find it pretty incredible that so many people seem hung up on CPF-related liquidity constraints when they don't stop to think about HDB- and property-related liquidity constraints. You're much better rewarded for accepting CPF-related liquidity constraints than you are for housing-related liquidity constraints (accelerating repayment on mortgages).
....So think about this. If $27K is a mere rounding error in terms of extended family finances -- equivalent to an average Tuesday night of bar hopping -- OK, who cares, do what you want. If it's a "Whoa, that's big!" reaction, then it sure doesn't seem like a good idea for cash flow and emergency reserve reasons.
....Wouldn't anyone like to investigate the
Silver Housing Bonus? (Earlier I said "Silver Support Scheme," when I actually meant the SHB. Sorry about that.) The government just announced an even sweeter Silver Housing Bonus deal, boosting the bonus from $20K to $30K. We don't have complete information, but from your descriptions so far this is a
textbook Silver Housing Bonus situation. The government is kicking in up to $30,000 of free money deposited into a Retirement Account with the SHB, which coincidentally is equivalent to paying off virtually the whole mortgage!