I have a pro marquee one but very rarely use it,I purchased it from e-bay for £300 it's the instant type one that you can put up in 3 minutes or so they say it's the heavy construction type with sides costing an extra 100 quid. You can't use it in windy weather anyway, it hasn't paid for itself as yet and takes a fair bit of van room I would sujest a van awning type one that runs along the guttering and pulls out rather than a gazzebo or marquee only my opinion, the marquee has been handy in the summer though for light showers
Malky