So am I..
Construct 3 is $99 a year.
Two years is $198, or 2*98.
You would like two years - you are willing to pay $250.
$250 is more than $198.
Simply buying Construct 3 would give you everything you wanted for a price lower than you propose to pay.
All of this is ignoring the fact that Construct 2 is a perpetual licence, that you already own, and will not expire.