There's no comparison between a wide belt and a drum sander, both in capability or price. You would have to be a very enthusiastic (read well healed) hobbiest to justify a wide belt sander. I have a Delta 18x36 and have nothing but good things to say about it. I bought it used for $500 about 5 years ago and have put more hours on it than I think most any other hobbiest ever would in 20 years. It's not unusual for me to run it for 2 or 3 hours straight. I did have one shaft bearing go bad and changed them, which wasn't hard, but that's it for maintenance. It just runs and runs and does a great job. Changing paper is fast and easy, and it never comes loose. I regularly make shop sawn veneer and the Delta is critical to sanding it smooth after it comes off the bandsaw. I also regularly sand panels up to 30" wide or so. The Delta is easy to adjust for that work and return back to normal operation; takes less than 30 seconds.
If I didn't have a basement shop with no access except for a 32" door, I'd get a used Woodmaster, as wide as I could find.
John