All valid questions with no quantifiable answers! However, i do believe that the size of opportunity is very large in a populous ( and growing ) country like ours.
~50% of their land is not utilized yet and they have 112 Crs in cash+investments and 158 crs as CWIP.
Wonderla can in my opinion easily put up 2 additional amusement parks by selling the excess land and using part of the cash. High income areas like Gujarat & Goa would be tailor-made and its only a matter of time before they start expanding their footprint thus increasing the size of opportunity.
As far as affordability goes - i would look at household per capita consumption expenditure as the relevant metric. Wikipedia lists India at $3,149 - but it seems high to me so need to verify it
However, if you have PE as a valuation tool in your assessment it would certainly look really expensive. It would be pertinent to mention Prof Bakshi outstanding article on paying up for quality.
If you haven't gone through it already here is the link. Even if you think Wonderlas expensive it is still an interesing read https://dl.dropboxusercontent.com/u/28494399/Blog%20Links/October_Quest_2013.pdf