The difference between a leap of faith in selling a house and in believing in Christianity is that there is a great loss if the buyer of the house doesn't actually have the money, but no such loss (unless you go all the way and become a hermit, or something) in being a Christian. However, by deciding not to be a Christian because there isn't sufficient evidence (while not seeing any other reason that it isn't true) entails a great loss in the afterlife, whether it's not going to heaven, or spending a long time in purgatory, or not being able to experience heaven in the same way as those who took the leap of faith (it could be any of those--I don't claim to know exactly how God judges).

However, there could well be other reasons for not believing than lack of evidence. I see no need to go into that now, so I'll leave you with that argument for now.