That is not that large of a dowry, BUT! You need you know the rules. Second marriage 0, already has kids 0, no advanced education 0, works independently of the family 0, has ever been in Pattaya 0.
The dowry is paid for well behaved, young women of child bearing age that can help support the new family, AND for the economic loss to her parents earnings.
On the other hand, you still need to pay for the wedding. In an Issan village, that will set you back maybe 100-120k. You would also need show money to maybe 50k that goes back to the bank.