You could put it on the market and have contingencies that satisfy your agreement. As for selling to a pension fund specifically, I think that would be more work than it might be worth, and you'd probably be better off making it open to all types of buyers.
Private buyers are usually looking for homes to live in and the one institutional buyer I've spoken to gives any existing renters the boot as soon as they take the title. The linked story sold an entire block of rentals as one lot. Maybe I'll get lucky and someone at a fund will see this thread and be interested in the idea.
