The cabin on an Alberg 30 would do for a single person to live aboard, but much more than that would feel cramped, at least by my standards. Albergs typically aren't very beamy boats and I don't believe the 30 (or Triton) have an aft cabin for storage/extra sleeping capacity.
If it's just you...go for it! If you've got others who will live with you, I'd look for something else.
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