Hi Draftstar - welcome to the forum.
We recently built a new barn and went with a pole building (poles in the ground, wood framing, metal sheeting on sides and roof); we also have a pole run in shed (wood framing, metal sheeting on sides, asphalt shingles on roof). The run in shed we built completely by ourselves and the barn was done by a local contractor so unfortunately I won't be of much help recommending someone in your area.
We chose to go with pole buildings because they were quick to put up and less costly than the traditional cement foundation/footing building with just as good longevity. Treated poles are used, of course, to prevent them from rotting in the ground. If the ground is not too rocky/stony at your place, that may be something you might want to look into.
My comment with regard to metal is that it's lovely to have something maintenance free but it's necessary to insulate it in some form to dampen the sound if you get rain or hail (which we do, in addition to snow) - if it's left as just metal the sound can be deafening during a storm and discourages the horses from using it.
Depending on your climate and what wants you may have for a building, you could probably get by quite nicely with just run in sheds (a tack room could be attached or built separately to be used for storing feed and/or tack - if you don't require a great deal of space, a prefab garden shed can work quite nicely). Where I am, we have cold winters and chilly falls/springs so it's very nice to have a barn to work out of for a softy like me.
Best of luck with the project and feel free to post work-in progress and completed photos as they're always interesting and fun to view.