Because the house I bought is less than two years old, is it reasonable for us to use the original owner's money to apply for a real estate license?

Whether it is reasonable or not depends on how the housing sales contract between the two parties is agreed. It should be clear to both parties that the transfer of houses requires additional taxes and fees within two years. Really at this point, the two sides should have a special agreement. If there is no agreement between the two parties, they all pretend to be lakes and ask the other party to pay, then your house transaction is impossible to succeed.