Btw, their airport transfer info is as follows
- Transfer from airport to hotel one-way Charge is 600 baht Sedan Car .seat available 3 person including luggage .
- Transfer roundtrip Charge is 1,000 baht special price sedan Car. Seat available 3 person including luggage .
- Transfer one way Charge is 840 baht hotel Van. Seat available 7 person including luggage .
- Transfer Roundtrip Charge 1,440 baht hotel Van seat available 7 person including luggage .
THB1000 roundtrip seems quite reasonable to me for hotel car.