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How do you choose which mortgage structure is appropriate when buying a home?
Down payment: Emphatically avoid PMI if at all possible; it's pouring money down the drain. Do 20% down if you can, or pay off enough to bring you above 20% and ask for PMI to be removed as soon as you can. Beyond that it's a matter of how much risk you want to accept and how long you'll own the place, and you'll have to run the numbers for the various alternatives -- allowing for uncertainty in your investments -- to guide your decision. Do not assume you will be able to make a profit when you sell the house; that's the mistake which left many people under water and/or foreclosed on. Do not assume that you will be able to sell it quickly; it can take a year of more. Do not assume immediate or 100% occupancy it you rent it out; see many other answers here for more realistic numbers.... and remember that running a rental is a business and has ongoing costs and hassles. (You can contract those out, but then you lose a good percentage of the rent income.) Double mortgage is another great way to dig yourself into a financial hole; it can be a bigger cost than the PMI it tries to dodge and is definitely a bigger risk. Don't.