L.M.
when you make a bid on the new house add a contingency clause that says that you have to sell your old house first before you close. if they are desperate, they'll go for it. if it's brand new on the market then they probably won't go for it. sometimes they'll go with a definite maximum time...say 6 mos. don't get stuck paying for 2 houses and a property...this isn't the economy for it. also, check around in your neighborhood to see if houses are being rented to see if this is a viable option and how much they are renting for. good luck...don't be rash...the perfect house will always be out there.