[Bluebull]

JB property cannot buy for investment because it will never appreciate.
if you buy JB property, you cannot stay there long term unless you work there or qualify for special investment visa.
it is a waste if you just stay there on weekend visit.
it does not make sense to buy JB property if you still live in Singapore.

Yes, if you buy for own stay
You can stay up to a maximum of 30 days per year
Unless you reapply and give valid reasons, like your mother is getting medical treatment 
Even that maximum is 90 days per year
However if you are working in Malaysia and got valid working permit
That permit allowed you to stay up to 5 years at one go
After that you got to reapply

Maybe, talents know something we don’t know.....