Owner-Occupied MFH Tax Questions

[Zach Adams]

So I'm looking for a duplex to live in at least for 2-3 years. I've qualified for a 3.5% FHA loan, and have questions about what I can deduct. I own 2 SFHs so I understand the standard deductions. Can I use these standard deductions for the whole duplex property? Do I have to split these in half? Can I put this property, and my others, under a company and write-off not only the rental units but also the unit I live in for doing business?

From a more non-RE Specific place, can a self-employed individual working from home office write off housing expenses? To what extent?  BTW I have an appointment with a CPA next week ;)

Thanks 

Zach