Keep two questions apart. Whether the household may buy is HDB's rule; how much a bank will lend is the bank's decision under MAS's limits. Passing the first does not settle the second.

The income test and the property test cover everyone listed. Check each person before you add them to qualify.

Buying a new EC uses up a housing subsidy. That affects the grant and any levy on a later purchase from HDB or of another new EC.

Most of the money question is in two places: when the price falls due under each payment scheme, and, for HDB owners, how the flat's value, bridging finance and the sale fit together. For one household's actual move, see 635B Senja Road to Copen Grand.