House hack cost segregation for STR

[Nebiyu Shukur]

First, Thank you for your time in reading this and responding 

For anyone that got some experience in using the short-term rental loophole 

I got my first House Hack. I'm using the walk-out basement (900sqft) for myself and renting out the upstairs (1900sqft) as an STR.

I have 2 questions I would like to get help in understanding.  

1.  Can I use cost segregation for the portion that I'm renting out to capture the depreciation? (I'll be renting it out for 7 days or less and doing material participation and so it should be counted as an active income) ?

2.  I read that since I'm using more than 50% of my primary residence as a short-term rental it is considered commercial property by the IRS and the regular depreciation must be 39 years instead of the 27.5 years for residential properties would this mean I would have to separate the (900sqft) that I'm living in as a 27.5 year and the portion I'm renting out as a 39 year or would it be all 39 years?