dobs are great for observing, found out not so good for DSO photos, and the planets are a bit tricky
if your into the moon, with a little trial and error, you may have the camera already, and can get some good shots, with the right software and processing.
heres a shot of the moon i took with my dob last week, simple point and shoot kodak on a camera mount that orion sells that attaches to the eyepiece ( afocal ) its like 25$ or so.

hope this helped a bit....main thing.....start with in your means, and grow!