NetJets also has finance and leasing options, if you want a smaller upfront expense. NetJets offers 6 percent fixed-rate financing on balances $100,000 and up after youâve put down 20 percent of the value at signing. You can also buy a pre-paid lease with the Marquis Jet Card, which is good for 25 hours of flight time.rices per share with the private aviation company vary depending on the type of jet you choose â light, mid-size or large-cabin â and how often you fly. The smallest share you can purchase is a 1/16 interest, which gives you 50 hours of flight time a year.