Yes, check with a professional.
The work you did should be evaluated under the standards in the articles I linked to. I'm not going to go further than I already have.
The interesting thing is that, if you treat the bathroom tile as an improvement under the BAR standard (betterment, adaptation, restoration) then you can include it in your cost basis for depreciation, even if the home was not placed in service. So you would get something over time, just not as an expense. Whereas, as an expense, it might be allowed all at once, or not at all, depending on the in service rule.
(Remember that, when you place the home in service as a rental, you should list it for depreciation using your adjusted cost basis, or the fair market value, whichever is lower at the time. Your adjusted cost basis includes the cost of improvements made since you bought the home, both improvements you made for personal use, and improvements you made to get it ready to rent. Just not repairs.)
