Want to invest in islamabad .. Your expert suggestions please....

Assalam o alaikum brothers and sisters...
I want to invest under 35 lakh in islamabad for 1-2 years.
I heard about top city-1.
What size plot shall i plan to buy and what's the potential within 2 years there? As new airport & new kashmir highway link also being ready..
Also i have a plot size 25x60 in sector 1-11/1 islamabad.
Shall i sell it now or you think i should wait a bit more please?
Your advise & kind suggestions will be appreciated all....
Thanks for time
Kind regards & allah hafiz jeeee...
Atif