Rising interest rates is likely to have a significant downward pressure on home prices. Think carefully before entering a very leveraged position (like the 3.5% down FHA loan) in the current market.
Owner-occupied real estate investments don't suffer from margin calls. If the asset price crashes, what does it matter so long as I can afford the monthly payments? If the home value is "underwater" then I can walk away and rent for 7 years, if I think that's better value.