Balloon Service business. Learn a few basic configurations, and you can start a balloon service. Business Overview With an investment of less than $1,000 you can start a part-time party balloon service and earn big profits on weekends and during holidays. Depending on your goals and ambition, you could even turn the business into a full-time lucrative going concern. Corporate events, grand openings, children's birthday parties, special occasions, graduations, retailer sales,...