It's possible, don't be afraid to try. Why not have your agent call around to listing agents and see if you can find someone who wants to sell you the house now, close in 2-3 months (or however long you can get this great rate locked in for) and rent back until Dec/Jan? I have a seller who really doesn't want to move til August but due to possible market times, the house is for sale now. Just as long as you run the scenario through your lender, it's a great option. It's a win win situation if you have a seller that needs the equity for the sale now. you can arrange a rental agreement with specific terms. As long as you don't exceed certain occupancy deadlines, you should be able to finance a normal loan. Veteran buyers do this a lot. They take leave and househunt but can't move in for several months. We did it ourselves...
There is usually alwasy SOMETHING that will work out! Look outside the box.
1-Read your lease, is there a buyout clause?
2-Just ask the landlord if they will let you out of the lease if you are buying a home.
3-As a buyers agent, I often coax the landlord into letting tenants out of their lease by offering to cover the commissions myself to re-lease the property.
Anytime there are people involved, there's room for negotiation. But, wait - have you found your house yet? You may decide to buy something that is being built, and won't be available until next January anyway. Who knows.
Make your contacts now with the parties you plan to use - a real estate agent, lender, etc. Get your footing in place, and let them guide you through the best way to handle this. If I can help, give me a call!
In my opinion, your best option is to explore what your landlord is willing to do if you wanted to terminate early. Many landlords don't mind letting you out of a lease as long as you pay the advertising costs to re-rent the unit and you pay the rent until someone else moves in.
Hope that helps.