DSR does not depends on the loan amount, it will be based on your salary range.

Based on your gross income, it should be 85%.

I will not recommend you to take up to 90% otherwise you're in for a really tight budget from month to month.

Usually high income tier (Gross Income > RM 10k) will be in range of 80% -90%.

Commitment calculation towards your credit card will be 5% of your all cards total outstanding, inclusive of installment plan, dial for cash/cash on call or balance transfer.

May I know if you're looking for undercon or secondary market?

Well, there's plenty of projects around Klang Valley, take your sweet time to shop around. Maybe agent will offer you New year eve package 

Do remember to maintain your credit card outstanding at 80% of total limit or else high chances your loan application will reduce margin.