[Elecraft] K2 construction options, now or later?

[Yves Dussault]

Hi K2 friends!
I have built a K1, with all options and it works beautifully! But, now, I 
would like to build the K2.
My question: may I build the basic K2 and add options later when my bank 
account lets me do it, like the 100 watts options or noise blanker, 
internal antenna tuner, etc?
PS: anybody wants to buy a K1?

Yves Dussault, VE2ATD
Laval, QC, Canada