Start Up Costs - One time only?

[Jennifer Hatton]

Do you have "start up costs" for each rental property or is it a one time expense for your first property only and ends when you list it for rent? I can't find info on if this is a one time expense when you first get started or if you get this for each new property you buy.  For example I just bought my first property last year and so my new rental business started in 2019 and I had start up costs.  I bought my second property this year and now I'm having new start up costs for this property OR not since I'm not "starting" my business??