My tip is go for the hand assembled local. Decide what size you want and bite the bullet. Every corner you cut will come back to haunt you one day.
You might still end up with a dud but if you have done all in your power to avoid it, the odds will be on your side. If it is a local you have some sort of after sales chance as well.
I probably broke the cliche record in there, but it is what I have done and my bus is reliable, which is priority number one.
And a reliable bus is so satisfying and fun to own the price becomes irrelevant during the first tank of petrol.
David