Okay so i have an estimate to do for a paver patio but the customer wants a concrete base since the patio thats there that i will be extending from already has a concrete base. and also he is adventually going to put a pizza oven and outdoor fireplace. so what i need to know is whats the best way to do a concrete base, do bags or have someone come in and do it, just sub contract it out to someone. i dont know. also im icpi certified but dont know a thing about concrete. thanks for any help!