You shouldn't have problems with the bellows on folders. I know they must prerish eventually, but I regularly use six different folding cameras dating from 1930 to 1954 and they all have good bellows. And the folding viewfinder should not really be a problem. If you have a "real" viewfinder, it does not show you exactly what you are photographing - at the least you get parallax error anywhere nearer than the horizon. Just keep important bits away from the edges and you can crop to achieve perfection.