PLEASE HELP! 21/2 yrs bengal up all hours!

Hi,
I'm new here and hoping for some help. My bengal is almost three years old and I have not had a decent nights sleep since I brought him home. I have two other cats and they play , they have all the toys, cat trees, beds, and almost everything else you can think of to keep them busy! I'm home all day, I try and play with him ALOT during the day, he does as he seems fit, since he does own everything! I just am getting sick because I cannot get more than four hours sleep a night. He gets up between 2 and 4 am and howls almost every night.
Is there anything I can do? Should I look into giving him a med from the vet to get him to sleep longer? I'm at my wits end! His name is Whitley LOL. My husband wants me to give him away, but I love him, I've had him for 21/2 yrs, I'm really at a loss.
Anyone, please help!
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