Snowmass
Line Up and Wait
Improvements yes. Maintenance no.It was my understanding that any asset eligible for capital gains taxes has its basis adjusted upward for the repairs, maintenance, and improvements made to that asset. A house is a good example. New kitchen, bathrooms, reroof, the cost of an addition all changed the cost basis for the tax liability calculation.
Normal operating expenses like insurance, oil, fuel, oxygen tank refills, annual inspections, etc are expenses that can only be deducted from income if part of a business.
As I said before ask a CPA. Advice here is worth what you pay for it.