FWIW Zelano is a handy system, you have agricultural and industrial worlds next door to eachother and chapsugaibo is not that far (1 jump in a decent ship) and is high tech. Chaps doesn't ban tobacco so you can ship tobacco one way and PEs the other for nice profit in between doing missions.
Th docking issue applies equally to the T7, although I think the T7 will carry more, ultuimately. The other alternative in similar price range to the clipper is the federal dropship - which has medium pad size in its favour but apparently handles like a barge, and is also quite slow. The ship I really fancy is the Python, but 50+ M credits