Mostly working in singapore or pasir gudang 

Me no expert! 

It depends on many factors:
1. Economy recession/recovery - people working in Singapore/Pasir Gudang/Nusajaya (lots of non-JB, or even expats with relatively higher paying jobs)
2. The upkeep of Prima Regency - confidence on the security and maintenance
3. Phasing of the 1800 units - if all of them are released into the market within narrow time frame...

Some known factors:
1. Austin is the higher end neighbourhood compared to where Prima Regency is.
2. I would prefer Jusco Tebrau over Tesco/Giant Plentong.
3. Hospital nearby.
4. Lake view units will be superb!
5. Plentong/Permas Jaya area has more matured commercial area (plus point for Prima Regency?)

Prima Regency is currently commanding RM 650-750 for basic units, RM 1000 and above for fully furnished.
So RM 800 for Palazio basic may be doable. Of course there would be people who are willing to pay more for newer and nicer units.

But 3 years from now, inflation/economic recovery may work for us, but over-supply/poor workmanship/poor maintenance may work against us.

(Will be able to tell better picture after I start living there...)