I wouldn't say $3000 is a lot for a clydesdale, depending
on the level of training, it's bloodlines, conformation, etc.
Personally, I've never handled a draft. I cannot speak from firsthand experience, then, but only tell you that I've heard wonderful things about their temperaments. They are reported to be gentle giants, level-headed with willing personalities. That is, of course, also dependent on their level of training.
I don't see why a clydesdale would be a bad choice, given that it has good manners, rides well, and you click with the particular horse.
The only issue I see, if all the above are a go, is tack. Drafts require different tack and shoes, so there is an added expense to the initial purchase if you don't already have those items.
Oh, btw. Here are plenty of folks who will tell you just what makes a clyde so awesome. ;) Anybody Here Own Clydesdales?