Question About Probes

I have been closely following the Mars mission and understand the importance
of the experiments, but certainly all of that gear ads complexity. Then I
look at the photo's Cassini is sending back and am in awe. So I got to
thinking, what the complexities be, in designing a probe that is just a hi
res camera, and a transmitter/receiver. Considering economy of scale, if the
device were small and simple, we could product them cheaply and in such
quantities that we could launch them all over the solar system. Let them
wander, take photo's and send them home.

What are we talking in expense? complexity? doablibility?

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BV.
www.iheartmypond.com