After-tax interest payment ($15,000) ($11,768) ($8,213) ($4,302)
Principal payment ($53,868) ($59,254) ($65,180) ($71,698)
Maintenance cost ($20,000) ($20,000) ($20,000) ($20,000)
Tax savings from depreciation $20,000 $32,000 $19,200 $11,520
Net cash flow from ownership $0 ($60,868) ($51,022) ($66,193) ($33,980)
PV cost of ownership ($185,324)