2. KW's current income plus your current income (need payslip)
Actually, just apply first. Only $10+. If you decide not to take up, it's only $10+ if you have not gone to choose the unit. And for alot of ppl, they not so lucky to get a good queue no on their first try also.
Last time when I apply for my flat, me & husband got agreement:
If we manage to get a good queue no to get the unit we want, then we go ahead.
If fated we not suppose to get good queue no here, we buy resale beside my parents.
Who knows, it's fated for us to get his unit, our queue no was 78!
You tell KW, it's so hard to get a flat now. It's better to apply now and change mind later (before you choose the unit, which is a few months later) rather than miss the opportunity totally.
Looking at the floor plans, the unit design is almost the same as my place for the 4rm. For the 5rm, it's just slightly bigger (in the dining & kitchen). No harm coming over to take a look :P