If your project does not generate any (or enough revenue), then it might make sense to purchase a $20 theme from websites like themeforest.net or wrapbootstrap.com.

These look polished enough that your customers won't know that you purchased a theme v/s hired a designer (they don't care anyways)

Once you have enough revenue coming in, you could then hire a designer to create a custom website for you (if you still really want to).