I apologize to be late to answer you. May I suggest you to stay at Le Meridien Suvarnabhumi (LMS) it’s not far from Training Center.
Could you please send my your flight schedule I will make a hotel reservation and Airport shuttle for you.
About transportation from hotel to training center I will send a map (Thai version) of Training Center to LMS concierge for call a taxi. Are you ok?
Any thoughts, please let me know