You need a signed sales agreement by both parties before you spend a dime. Until that happens, the boat is not really "sold." Once the contract is in place, it should spell out who is responsible for what. Get the survey done first and address all the issues with her - ie; it should point out the lack of shore power cord, so you can use that to "motivate" her to go get it. Then sea (river) trial and close the deal. But yes, coordinating everything can get cumbersome -- thus the "advantage" of a brokered boat.