The greatest benefit would probably be the guarantee of payment.
Explanation:
Many artists take commissions for a variety of styles and reasons! But for the most part, its a very good way to use your skills to make money. I know im still waiting on people to buy commissions from me :D
High renaissance can be defined as the artistic style of the first half of the sixteenth century in western europe especially as manifested in Rome and Florence and characterized by heroic centralized composition, technical mastery of drawing and conception and a mature humanistic cintent.