Hi, @NMLPC .
Thanks for the post! I hope your day is off to a good start. The answer to this is tricky, as it really depends on your forecasted sales for the week/month. In addition, it would depend on how quickly you are able to receive, or produce the extra inventory.
It can be as easy as enabling “continue selling when out of stock” in Shopify so that your stock is able to go into the negative. Or, by using an app such as Stockbot Inventory Forecasting. This app uses your sales history to predict stock levels and the inventory required for the upcoming days. Additionally it has low stock notifications so you know when you need to replenish your inventory.
In the meantime, can you tell me a bit more about your products and business model ? This will help me provide a more tailored approach.