House hacking - improvements out of my pocket or rental income?

[Arthur Banks]

I'm currently "house hacking" a 2 unit. I was planning on staying only one year before moving on to the next to repeat.  But I may stay another year.  Anyway, the question is since this is my 'home', I want it to look nice, so there are some improvements I was considering.  But I don't quite know where the line is for improving on my dime or the rental income. For instance, I want to redo the blacktop driveway, add some landscape (shrubs and things that won't need a lot of care when I move), replace windows, paint floors/walls and finish some missing drywall in the basement. Things like that.  What have you done in this situation?