Dear Freedom,
I personally think it's a good time to invest in JB now. If Iskandar takes off in a big way with the ETP, properties will rise in value over time, although i think it will take many years for our profits to be realised. Am thinking perhaps 10 years or so? I do agree strongly that having a property in JB is a backup retirement plan, in case SG gets too expensive in 15-20 years down the road, we will still have a good place to live. SG will always be more ex given we import most items from overseas.
So, I can think of 2 scenarios:
1) JB properties do very well, ie. property value appreciate more than 2 times from now -> sell and take profit, continue living in SG
2) JB properties don't do well, ie. assume zero appreciation -> rent out SG property, move and retire in JB!
Foolproof plan