I think there's a reason why online vendors just offer a money back guarantee because that is more cost effective.
It is all about money. Source quarantine will never happen. The only exception that I know of, is that some aquarium services offer a 100% thirty day guarantee (only if nothing wet is added to the tank being maintained) but their prices are definitely on the high side because they incurred the cost of quarantine. So if you want a turn key aquarium and are willing to pay for it, here is your opportunity.