A bit on the airfare. heard my friend say ticket to Thailand is very cheap. I got from tigerair for $295, don't think it's cheap right? Anyway I wish to record down some info of travel hope can share with others here.
Hope to get on Baiyoke 2 Tower for arial shot. 150bht
Baiyoke Tower II - Wikipedia, the free encyclopedia
$295 is ok if it includes baggage. If you get good flight timings then prepare to pay more.
Your information is obviously outdated - you need to learn how to ensure that you are getting the latest info or you will be ill-prepared.
http://baiyokesky.baiyokehotel.com/baiyoke-observatory-point-bangkok.html
It's 400 baht at sunset timing now. Which is why I didn't go. Personally I think you might be better off going to Lebua, where you can probably grab a drink at that price. The view is also better. But well, if you really really like the Sky Tower view then you can go I guess. They also have a buffet which includes price of admission to the observatory.