There's already a lot in our forums on the topic of which pico projector to buy. Please check out this topic: https://cookieconnection.julia...9#578337920045331739
As for your other questions:
(2) Don't copy copyrighted art. Look for royalty-free clip art or art in the public domain.
(3) I don't understand how this question relates to decorating with projectors or what it means?? If not related to projectors, please start a new topic for it.