You can get very far with just sales and marketing, but if the quality isn't there, reputationally, that's going to catch up with you over time, same if you have dodgy business practices (i.e.: predatory pricing practices for existing customers, impossible cancellations etc.).
What do most managers have access to on their corp card in terms of spend limits, without needing to get VP/finance approval for their purchase?
In my mind, I had the limit as $500/month (potentially from some old readings on the subject).