With different things that are needed for each business, you are going to realize different start up costs for each of the above. You will see the biggest start up costs in the pet grooming business. The cost of starting up a pet business can run you close to $50,000.Pet pooper scooper services, pet sitting, and pet daycare will not have as much of a start up cost due to minimal equipment needed.Pet clothing, toys, and food start up costs will depend on the amount of merchandise you wish to put into your business.et Business Ideas and Start Up Costs. Because some pets are considered to be on the same level as people, pet businesses are starting to be a growing trend. When it is estimated that Americans spend thirty million dollars a year on their animals maybe it is a great time to break into the pet business.