1) High end condos
For this purpose of discussion, we shall simply define it as property above 350K.
Ceiling is set via LTV - should we agree on this then the issue much simpler.
Assume also LTV remains in force into perpetuity - though in real life may not be, just for discussion's sake.
RM350k is way too low to be considered high end.

It puzzles me when my banker tells me that people who earns 6k per month are buying property worth 800K with minimum downpayment. This was before the introduction of the 40 yr loan. Assume 30 yr loan, with interest rate of 4%, a loan of 800K (due to the 90+10 package), the monthly instalment will come to RM3820. I cannot see how it can be done with an income of 6k actually.
Loan installment can go up to 80% of your salary... so RM6k = max RM4800 installment. The 1/3 rule is just a guide. You just need to find the correct bank and a banker who knows how to get things done 

RM3800 for RM6k owner is impossible.

Imagine that after deduction, u get only 5k, then after this you only have RM1200 for spend.

Unless u r already rich and cash free then u can hold it for a while.

but this kind of investor usually is flipper, and must flip within shortest period...

well.. if this cannot be done, the consequences are very deep for him..