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Ohh the big issue with beginners using a dob is none of them are aware it needs to be collimated and if they're new to telescopes well that will be a problem a family not familiar with telescopes the mirrors get knocked out of alignment from being moved around chances are they will have a big problem when looking at stuff.
Dob isn't good for beginners..
Beginners should stick with a refractor and if decide to stick with hobby then maybe go with a dob take in mind an 8" dob weighs around 40-50lbs base weighs about 25-25 OTA possibly the same not something your kids can setup by themselves if your kids wanted to have the scope out.