Unless you have the people,that's alot of equipment.No one will lease equipment to a startup unless the lease is in somebody's name with great credit.For what you're asking expect to pay 250-300 for used snares,300-400 for quints and 175-200 for basses.Cymbals are 100-175 a pair.Mallets are about 2000-2500 for marimbas and vibes 1000-1500 for xylos.Add uni's, circuit fees,copyrights and then staff.Start with a smaller number and grow.Right now you're at about $14,000+ without staff and travel.Thats about $700 each member just to start.If you want to know how to get the stuff cheaper drop me a line.