Cedar Wardrobe Cabinet Humi conversion..need advice

[e-man67]

So here is the description:

ORIGINAL FINISH, CEDAR LINED, GREAT FOR STORAGE, ROUGHLY 6 1/2' TALL X 48" W X 24" D, GOOD CONDITION CONSIDERING THE AGE.

So I am thinking this would make one hell of a humi cabinet...I have aked the question to the person selling what type of cedar it has in it (I know I can't use aromatic). Do you think this would be a nightmare to seal up properly? What would you use to seal it? I would much rather drop the coin on the cigars than a super expensive cabinet....if I could get the cabinet to work. Would you use a MoistNAire unit? What are the other options to convert such a piece?