I can't offer much advice but with your gym membership...I know at my gym you can transfer your membership over to a family member. If you explain your situation they might let a friend take over your membership if that's possible or find out how much it would cost to end the contract.
I hope you get it figured out.....and you won't have to wean. You could do ff while you were at work and then breastfeed when you are with him. Your body will adjust if it needs to.
You could always move to Newcy and get your sister to be your nanny! Then he wouldn't be with a stranger (long shot I know but we'd happily have you down here!)