Owner-occupied rental property tax strategies and resources

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Hey everyone. I currently own one investment property. I read BP's tax strategies book and did my bookkeeping for the year so I'm pretty familiar about tax strategies for investment properties.

I'm currently splitting rent with a friend at a cheap apartment. This made me realize I'm okay living with roommates which gave me the idea for my next property - I want to buy a property as owner-occupied, live in the basement (or cheapest room/unit), and rent out the rest. My goal would be to bring in enough rental income to offset the expenses so that I can reduce my housing expenses as close to zero as possible.

I've seen some scattered info on the web that deducting taxes from owner-occupied rentals is a bit different (square footage versus # bedrooms rented out versus pro-rata, etc). This got me thinking that before I go analyzing deals, I'd like to know if someone can point me in the right direction. 

I am looking for resources about tax strategies/write-offs/deductions that I should be taking advantage of so that I can better analyze deals on the market. Are there any books covering this?

In addition, I hear that there are provisions that supposedly disallow turning your owner-occupied home into a rental. But what if I stay living there? If I move into my new home and it becomes my primary residence, am I allowed to immediately start renting out bedrooms? Or do I have to wait some time? Note: I'm not talking about briefly moving in, getting the lower interest rate, then moving out. 

FYI, I'm in Illinois in case it makes a difference. Thanks in advance.

EDIT:

Quick scenario: 5 bedroom single family house. I move in and rent out 4 bedrooms and live in the 5th. Where do I start with calculating tax deductions on this?