Venue Details For Birthday Party

Happy to say that our child is turning 1, next month. My husband and I wish to celebrate the birthday. We have planned to make it a very grand celebration as she is our only daughter. Since my hubby is always busy with his works, he doesn`t get time to do the necessary arrangements for the celebration. So I`m planning to contact event management companies for choosing the best event venue ( https://www.lejardin.com/ ) to conduct the party. We are planning for a night party as everyone will be free after their job. My concern is when I appoint an event management company, will they do everything necessary for the party including the decoration and food? What would be their rates?