While it's understandable Singaporeans like landed properties because they stayed in HDB, I will still suggest to only choose smaller single storey interterrace because
1, easier to maintain than corner terrace with grass patches.
2, front porch should be full cement again for easy maintenance
3, install auto gate, so that you stayed in the car, open the gate with remote, drive your car in, close the gate, check no burglars are in the front porch, then you open your car doors. This is for safety reasons.
4, choose single storey terrace with 4 rooms if possible, edmwers all getting old, it's useless to have 10 bedrooms in second floor. It's better you can ulride your wheelchair or pma/pmd in your house. You won't need more than 3-4 rooms at first floor regardless as your family, even if have will unlikely to follow you retiring in Malaysia.
5, advantage of single storey = higher ceiling and more refreshing. Can hang some beautiful chandelier also.
6, lesser volume in single storey interterrace also means less expenses on electricity cooling down the whole house. Most Singaporeans stay in Malaysia for retirement. Bigger isn't always better. Saving electricity bill is.
6, interterrace is also easy to be secured as solid cement wall from both sides. Front and back door protected by metal gates. The only weakness is the attic, which can be further secured. Most burglars in Malaysia are small time thieves. If they find your house too small and need to climb from the roof to break-in, they will target bigger bungalows with more glass windows or side gates that can be easily compromise and bungalows also means "richer".
So, get yourself a single storey terrace house with high ceiling. Some can even build an additional room at the middle higher ceiling dinning area...