You should also ask yourself whether or not your chosen company can handle business expansion. Changing providers is always a tricky process, so if you choose a company that can provide for all eventualities, then why not do so! As your business grows, your waste collection service should be able to adapt since your needs will also change!
This is where timeframe/schedules come into play. Uncollected waste left lying around is a hindrance to any business, so your chosen provider must be efficient & reliable. Comparing how frequent council collections are vs private companies and you may be surprised about how infrequent council collections are. A slower frequency may suit your needs, but as companies grow your needs will follow. Private companies tend to cope with commercial waste collection better as their sole focus is to cater to businesses.