I guess a koala would be easier as a pet. They don't move around much, they sleep most of the day, and they'd only need a couple of gum trees. Just avoid getting chlamydia from them.
If you were to observe Lent, and give up one luxury or vice for 40 days, what would you give up?
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It is easy to go down into Hell;
Night and day, the gates of dark Death stand wide;
But to climb back again, to retrace one's steps to the upper air –
There's the rub, the task.
– Virgil, The Aeneid (Book VI)