250 and 500 or even 650cc Jepunis bike maintenance not much different la... even the tyre size almost same2 price range....

From kapchai to 250cc yes, the maintenance expenses gap is huge....

try to find 250cc used bike is better compare to get a new 250cc bike, at least you can spend the extra money to mod the pillion seat more comfortable.

Some say stick with 250cc, many said you will grow tired of it and upgrade... Everyone have their own opinion, at the end is your own money where to decide.. not us.. we just giving advises and options as we been into your situation before.. so close ur eyes and take the leap.. haaha