How Much Is Enough?

I'm working with a buyer presently, and we have looked at homes for the last 60 days or so.  Unfortunately we still have not inked a contract.  We got really close this week.  She found a home that she liked in a neighborhood that she liked.  She called me all excited on Sunday insisting that I find out if the home is available now.  I told her I would follow up asap on Monday with the Listing Agent.  The Listing Agent thought the home had to go through an auction site, but I told her the auction site did not show the listing any longer.  Not sure how the change happened so quickly.  The Listing Agent said 'send me a contract and I will see what I can do.'

I put the contract together after reviewing comps with a suggested asking price and sent it to my buyer.  The buyer responded back that she was upset because I had put in a suggested asking price.  Now mind you we had dicsussed the pricing in the neighborhood in general and the rcent comps.  I apologized to the buyer and advised her that we can offer whatever she wants to offer - just let me know so that I can prepare the paperwork.  Well, unknown to me the buyer had taken a friend to see the home and the friend commented 'there is no place for guest to park if you have a party.'  My buyer came back to me on Wednesday with this as a concern.  I was shocked.  She even admitted to me that she would rarely throw a party, but that was something she had to consider.

So today we had a meeting of minds because I just was not sure what to do after 60 days of showings.  She said to me that we have not seen enough homes.  I said to her 'we have seen over 40 homes.'  I'm still waiting for the pause to be over.

How much is enough?  At what point do you say 'Mr./Ms. Buyer enough is enough.'