I do this for a living. If you really wanna save yourself some money, depending on your plumbing(usually PVC, older houses might have cast iron), just put a bit of a cleaning agent and run hot water into your drain for 10-20 minutes weekly. The hot water alone every week will do more for your pipes in the long run.

If you’re doing this regularly you won’t have to run the water as long, maybe 5 minutes weekly. This helps to dissolve build up from stuff like grease and soap scum which catches other food debris and leads to clogs. Preventive maintenance is best, spend a little time and money now to save a lot of time and money later.