I'm not a pianist.....just give out some opinion....

In my opinion....most of musicians/people acknowledge that it's very very hard to learn to play a piano.....that's why most of the parents send their son/daughter to learn piano since they were still a kids....hopefully they can have a better learning way or to be a pianist in the future.....whatever....you've to put in much more effort in learning how to piano....it's easier to absorb the skill if u start to play when u were still a kid....

just to share out my experience......i got a friend..he's a pianist...he laern piano since he was 5 years old.....he told me that he always felt of wanna give up....but he still urge to force himself to learn piano....he's a Grade 7 piano player now....he'll sit for the Grade 8 next year....he's 16years old now....what he want to tell me is.....whatever problem i faced when learning my guitar...just take that as a lesson...dun give up easily....

Anyway...hopefully u can successfully overcome your problem and achieve your attainable dream......Good Luck.....

The casio WK-1800 is around RM1700.....my mother jus bought one when i was buying my guitar.....i tried it once or twice every week in a couple months and felt that its function is quite wide and suitable for a beginner....easy to use......talking of function and quality......your budget seems to be can afford a KORG......you can try to pay a visit to Bentley Music oppisite is Lot 10 and KL Plaza....Good Luck

yeap...totally agreed!
the synchronisation between both hands is much harder than guitar......