I bought my all in one regulator from glass gardens and I am happy with it.
I wouldn't want to ship a tank, but I assume that onlines probably the cheaper option for the smaller hardware.
I'm not sure what you mean. The regulator used for a 5# tank is the same used for any other tank. You couldn't have the cylinder shipped filled but that's just $5-6. That would make that aluminium tank $45 or so. Anyway well worth the price. I would inquire about the shipping cost.