If your landlord agrees to deposit 10% of the purchase price to ensure the purchase and then up all payments for land conveyancing by uncluttered Thai law.
If you do landowners need a deposit of 10% of the purchase price to ensure buy-in. Then make all payments on the date of transfer of land under Thailand law.
If you agree to the landlord want to deposit 10% from the purchase price, to ensure the purchase. Then the date payment in the transfer of the land according to the Thai law.