You need to give a little more information about things before an informed answer can be given. Are you providing feed & forage? How often will you riide for 7 how long? How far will you have to travel, how many miles (Mileage) & time it takes? How many times a day will you be going there? Will you be grooming?.... so many things you need to itemise before a costing can be worked out.
sorry, horse is on DIY livery at the same yard.
There will be enough feed to last the time the owner is away and haylage is included in livery. Bedding can be bought from yard.