Another idea. You could write interesting posts and put them with the #proofofbrain tag. Then you'll receive POB tokens which are often worth close to $1 each. You can trade them on the market for SWAP.HIVE and then you can withdraw that swap hive and use that to power up.
EDIT: Looking at your wallet I can see you have already likely been aware of this for some time. It is an option to use without having to power down.