I run a doggy day care center and am looking for a solution allowing my customers to book their dogs into our day care for up to a month in advance. Some complications include automated variable prices such as discount offers, Book 2 days a week for July and automatically get 5% discount, Book 3 days a week for July and automatically get 10% discount, etc. Also need discounts for multi-dog collections from same home. Monthly package deals to include dog grooming when you pay monthly in advance for a 12 month contract, etc etc. Ideally I want this to integrate payments with HSBC merchant account but would be happy to use paypal if not possible