10k+ monthly should be fine. Depends on what type of unit you are going for as well. Penthouses and suits are going to be a lot more ex and I wouldn't buy those with a combined 10k+ income.
Actually, a lot depends on you. If you earn 20k, but spend 15k a month, then you won't be able to afford it. The bank agents will tell you how much you need each month in housing instalment payments.
Got different type of plans also. So, you can shop around a bit first before you decide on which bank you want to go with.
Clover is quite affordable though. especially the lower floors which are going for a lower psf.
View not as good of course. I wonder what the view from the penthouse would be like. hee. Must be breath taking!