Cost Segregation and 4-family buildings

[Ysanne Isard]

Is it worth the effort to do Cost Segregation Depreciation for a smaller 4-family residential building?

According to the IRS there are several methods of doing a cost segregation analysis, one of which is a 'Rule of Thumb" analysis that takes an industry standard. Is there an 'industry standard' for residential buildings when doing Cost Segregation?

Thanks to all..