I am working with a client who's read about satellite sites on a SEP book and has been building hundreds of keyword reach domains (buytoyotacorona1989cheap.com, brandnewsuvinred.com) with specific content about such domains. They all link to a main domain (CompanyName.com) where most of the information is either repeated(from other sites) or new.

I told him to drop all the other domains and only focus on building good content for the main site as it is too difficult to maintain so many websites, plus they might look like link farms to Google.

He told me to make a Google search for "Buy Toyota cheap " and two of his websites were listed among top 10.

So it's seem to be doing some good, but I get the feeling that what he is doing is wrong. What other arguments are there to discourage this practice? or is he doing the right thing?

My arguments have helped him to decide go down from hundreds to close to one hundred (because cost of maintainance) but I believe he should only have one or two sites.

PS: The business is not actually about cars.