Difference in strategy between Offline niche and digital products?

I'm in the offline niche and rather new to IM.
I'm applying what I've learned here, to help offline clients.

Seems it's not simply copy and paste the digital product market strategy.
But it is what I'm doing with all of them. Website design -> keyword research -> articles -> article marketing -> onepage/offpage SEO -> social bookmarking/networking. (Probably missing a few--but essentially the norm here when it comes to marketing any site).

Specifically, I'm working with:
1 restaurant
1 auto repair
and 2 realtors.

Questions that are arising:
For example--the realtors--should SEO be my main focus? I'm thinking there may be a threshold where too much traffic generates leads that are not serious buyers/sellers, a time-killer for realtors. That's my greatest fear--a call from one of them "I'm getting 50 calls a day, 10 listing meetings, and no signed contract!!"

For the restaurant, I'm less worried about SEO. My plan is to interview customers after they eat, and encouage them to (or do-it-my-self, from their own words) -- submit the reviews to review sites such as citysearch. Similar case with auto repair client, with the addition of perhaps a youtube video commercial and video testimonials.

So I know this thread is pretty general and indirect.
Hoping for suggestions!


Also, if you're experienced, please feel free to PM, I'm open to hiring consultants to 'look over my shoulder' with this first set of clients.