Enough for what? I've done my share of small biz consulting, and the discussion circles around why they want a web site to begin with. Honestly, I have yet to meet a small biz owner who gives a crap about the web site for its own sake. It needs to contribute to their larger goals. That is not always growth... I've worked with folks who are already at capacity for their size and want streamlined communications, not growth. Maybe a few forms for their customers to submit info to them, make appointments, etc.

Maximizing search placement is sometimes useful for small biz sites, but it is never a goal in and of itself - it is a tool. SEO approaches need to regard it as such.