All deck companies have to survive so at times you have to build with lesser materials, however you want to be careful not to sell your soul—and your reputation in the process.
When folks have a small budget but want something that looks grand you can always steer them towards simplified details and pressure treated or rustic materials. You need to also educate these people as to what they should expect. Pressure treated materials will crack and twist more than red cedar—so flaws in the materials will be evident. When they stain with a solid color stain they will see knots bleeding through. Coach them towards a semi with more color- and a more rustic appearance.
Be realistic about expectations and share your experience up front.