You could turn this into a short timed trial rather than relying on impressions. Give each candidate the same sequence: import the listing, add a lead, schedule and move a viewing, upload a revised document, change a permission, correct the Mexico City information and hand the record to another...
With a country home, I would pay particular attention to inspection findings that could expose other work once opened up. A single repair estimate is not necessarily the final bill. Rather than assigning the whole repair pot now, get the report, request prices for the urgent items and keep some...