I have mentioned the pricing of Araya in my thread. Tagasako is similarly priced, and is more or less the same in quality, but preferred in the market.
I'd recommend changing BOTH the front and rear Rims for your bike, that is, if you want to stay away from Wheel Balancing/Alignment every 3 weeks or 6 months. Expect to spend at least Rs.10k on just tyres/rims. Of course this is a rough estimate, but you get the idea about the kind of budget needed for this job.
It costed me nearly Rs.5000 to get my Rims changed on my CG125 (including brand new tubes for front and rear).