Well, if you loaned your brother $50K, and he promised to pay $42K back before you remodeled your home....would you wait until you actually got all or part of the $42K back, or would you go ahead and sign a contract with the construction crew to proceed with the remodeling?
I'd say you would wait for some return first, then commit to future projects.
Or is that too narrow of a focus? I forget sometimes.