R.Y.,
The cheapest,pro quality workstation keyboard with the nicest sounds & sequencer in a budget price-with light keys,would be the Korg TR-61.
This is personally,my highest recommendation for a workstation for a $1,000(new)
I strenuously advise that you buy new,and also buy from Sweetwater.com,for 3 very important reasons:
1)Since this will be your first professional workstation,you need a very knowledgable staff to guide you through this workstation(because there is not really any such thing as user-friendly,if you're a novice to pro keyboards of the workstation type)
2)Even though Korg is extremely reliable & durable,it's always smart to cover your ass,when you make an investment such as this-which is why a product with a warranty may possibly save you a tremendous amount of money and headaches in the long run.
3)Anything you buy from Sweetwater will be backed up 100% and they will take care of any problem or question you have with your product and you will never get stuck with anything you don't want,because they have a unconditional return policy.
As far as pro keyboards go,6 months is a reasonable amount of time to completely navigate yourself through all the functions of a workstation,as anything that produces pro quality cd's-is going to be a learning curve for anyone.
From my personal learning experience,I was taught the fundamentals of workstation recording through a friend that owned a recording studio,so I had that advantage working for me.
However though,don't let yourself be discouraged or intimidated by pro
keyboards,because once you nail down the basics-most keyboards are user-friendly.
I personally find hardware sequencing(within a keyboard)-much more user-friendly in general,than computer recording-because of all the compatibilty issues of a computer.
Alot of workstations these days have an enormous amount of processing power which is comparable to pc's and hardware sequencing is a much more efficient way to lay down songs.
Once you master the art of workstation recording,it's like having your own little recording studio-which is a beautiful thing.
Just out of curiousity,what system does your your friend have?