Access to the actual site is big deal… is it hard to get to the location or easy?
How much turf damage will you do traversing equipment to and from the patio site that will need to be repaired?
where will you dispose of the over burden from excavation?
On a base bid you are looking at $3000.00
But you could have this cost more based on the above.
A patio meant for foot traffic, not vehicular traffic, depending on subsoil conditions, does not necessarily need geotex btw.