Buying those 5 houses, if and only if your DSR allow to buy all 5 houses, you still need to fork out more money for the 3rd, 4th and 5th unit.
Assuming developer giving 10% rebate (zero downpayment needed)
1st house - 90% LTV, 10% rebate
2nd house - 90% LTV, 10% rebate
3rd house - 70% LTV, 10% rebate, 20% you need to top up with cash
4th house - 70% LTV, 10% rebate, 20% you need to top up with cash
5th house - 70% LTV, 10% rebate, 20% you need to top up with cash
By doing loan compression, 2 advantage:
1. DSR burst. meaning example ones income maybe can loan max a 600k property only. but by abusing this loophole, he/she now able to loan 5 X 400k to 600k property. Instead of buying 5 X 120k to 150k property.
2. 3rd, 4th, 5th house all getting 90% loan from bank as explain above.
Bnm issue dsr and ltv guidelines for reasons. Those who has the resources to invest need not obtain loan through loan compression/fraud.
Signing on spa and loan agreement could be easy; making loan repayment is another story.