Frugal

Definition - 1. Practicing or marked by economy, as in the expenditure of money or the use of material resources.  2. Costing                     little; inexpensive.

Part(s) of Speech - adjective

Word used in Sentence - The buying of a car is a frugal expense for Bill Gates.

Where I Found the Word - I found this word at Mr.Maite's web site on his SAT review game.