I disagree with the suggestions to sell the digital equipment. Personally, I can't see to point of owning both the Hassy and the Contax. Pick one or the other to sell off, IMO. To keep the stuff on which you would take the largest monetary loss is my suggestion.
No point in selling the digitals, as they are still just as good as they were when new (meaning that upgraded models do not make them "obsolete"), and they have lost too much value to make it worth selling them. You bought them for a lot of money, their monetary value tanked (as you knew it would, hopefully), so just shoot them until they fall apart (which may take longer than you would imagine), and call it money well spent on good tools.
Nothing loses its monetary value until you actually sell it...so don't sell them, and they won't lose any value. Shoot with them, hopefully make money with them, and get rid of one of the redundant medium format systems. The value of the film cameras is much more stable, so I would view them as more disposable.
The way I see it, when you buy something knowing its monetary value is going to tank, you are buying it as a long term investment in a useful tool, and you use it until you have got your money's worth out of it, with no consideration at all to resale value. Why anybody buys new stuff just to sell it in five (or fewer) years is beyond me. It is financial folly.