While Jesus was present with them, all their needs were provided. Just before Jesus was arrested to be crucified He asked His disciples, “When I sent you without purse, and scrip, and shoes, lacked ye any thing? And they said, Nothing.” (Luke 22:35).
Thomas is like the guy that if you tell him there are 581,678,934,341 stars in the universe, he’ll believe you. But if you show him a sign that reads “Fresh Paint” he must make a personal investigation before he believes it!