Have just read all this thread
The thing that confuses me most, and I have heard of this being done many times, is if 1 million Baht or any other large amount is put up just for show, then aren't questions being asked in the future by neighbors when the results of that material wealth are not evident?
Regardless, make your own decision on the scenario you put forward. There are equally as many different scenarios as there are falangs with thai partners. What I mean by that is while some may think a thai bride to be would never think of suggesting that her future partner go visit a bargirl to satisfy his needs so that she may marry as a virgin, I know of a few cases where this has been suggested, with the falangs in question accepting and declining the invitation. However as soon as the relationship is firmed either sexually or legally then the "chop-chop" rule applies.
The only bit of advice that does generally apply across the board to everyone is as Arjay says "take your time". As BM stated, one can also apply with humour the "jai yen" stance especially when money, gold and jewellery are implied, and if thai girl care then with time these will gradually also disolve to the important ones - education needs for family members and sharing with items that the family unit as a whole are struggling with.
Good luck with your choices.