How soon can you refinance an FHA loan?

[Ellie Narie]

I bought a 4plex, and I bought it at 10% less than the appraised value, so essentially I have 90 LTV. I bought it using an FHA loan and have to move in within 60 days.

How soon can I refinance? It's at 90 LTV so I'm wondering if there are some banks that allow refinancing, where I wouldn't have to occupy it after refinancing. Should I wait 6 months to a year, or should I just do it sooner?

It doesn't need any rehabbing or anything like that. I just want to get another FHA loan to get another 4plex later on.