Investors & landlords

Thank you, TurboTaxColeen, for speedy answer.  Based on your ans, I will lump all the improvements as ONE improvement.  A follow up to your answer to Q1 - When I lump all the improvements with title "major improvement" & I am willing to settle for 27.5 yrs depreciation yrs, how do I answer to all those TT questions & then know, in final outcome, that TT will choose 27.5 yrs (because I installed bathroom counter tops which should use 27.5 yrs even though other improvements have shorter life such as 10 yrs, 7 yrs life etc)?  I use TT for many many yrs & I had experience that sometime TT has a mind of its own & may choose 10 yrs or whatever yrs based on my answers.  Thank you again.