Thanks for the update and enthusiasm, it was good meeting you last weekend in Amsterdam!
When it is more common in your country, .
org.th or .
com.th is of course similarly OK (I assume you have a similar situation as in the UK, which uses .
co.uk / .
org.uk)
In Amsterdam we already shortly discussed the reformatting of the existing Thai monument lists (on th.wikipedia), could you link this as well from the page on Wikimedia Commons? I also see that you copied the timeline from the Dutch competition. Probably it is best to copy the updated timeline on
http://commons.wikimedia.org/wiki/Commons:Wiki_Loves_Monuments_2013/Timeline . Please bear in mind this is still a 'perfect' timeline, for a perfect world. As you started later, it is to be expected that things happen later, and that you may have to skip certain steps.
Best,
Lodewijk