Forgive me , but if you've found only one usage for the Hasselblad in years, is this the right way to approach the issue? By which I mean is it not the case that the disposal of the Hasselblad is a given (and quickly; prices are dropping) and that the real issue is whether to get the Rollei fixed and keep it or whether that should go as well? I mean you say that you'd like to have the bigger image when you need it, but it does rather sound like you never actually need it. Either get the Rollei fixed in the belief that you'll use it, or shed that one too.
Buying used Medium format equipment is not difficult. If you later decide to make images that would benefit from a bigger image, its going to be easy.