In my opinion, tanjong rhu at <900 is reasonable buy. Though 99lh, the area has good potential, with kallang biz park, garden and sport hub in plan.
As a first timer, buying hdb or condo, u are likely to buy at peak, price may adjust downward, if unlucky. But with all the $$ printing, It is better to own a private condon than hdb. If inflation hit, and price rise again, private housing is less restricted by government ruling. When recession hit, and price fall, both hdb and private are impacted.
Get a old resale which is lag in price.. Costa rhu is fine. Just don't overpay for a new development at this point. Definitely not the MM..