Most company’s are interested in helping buyers with questions if they are related to issues concerning their product. However, they expect the person buying the item to know how to use it, or to have / planning on getting proper training in how to use it. They will I am sure be extremely reluctant to be a source of information and be ‘bombarded with questions’ about basic use and setup.
I think one of the best sources of information on bandsaw use and setup are the vidoes on uTube by Alex Snodgrass. You won’t go wrong by following his advise and methods of setting up a saw.
For a first bandsaw, I would usually suggest one of the older Startrite, Wadkin machines, These will last for generations, and maintain / increase in value. However, if your looking for some support / spare parts, I would look at the SCM MiniMax S45. This is a well built machine, strong back, industrial quality, and you can buy spares for older machines as the design has hardly changed. A good secondhand one will be cut a £1200~£1500. New they are around £2300.
Most of the modern none industrual machine are not sufficiently stiff to tighten up the maximum width blade they specify they can take. If the back is not sufficiently stiff the blade will wander in the cut as it flexes no matter how good the blade is or how well you set it up. the deeper the cut, the more apparent the problem. Any bandsaw setup correctly should cut straight, a lot don’t, and there are a number of suggested solutions including adjustable fences to compensate for the blade bending out of alignment Which are just work around s for a poor saw.