you want to run 60 ft 6 in to the front of the house, to join with the existing house main to the street(there are PVC 4+6 Y joints) . If the existing house main is 6 in( usually a 4 in) that's ok; if it's 4 in, then you have to dig out from this joint to the street drain and replace with 6 in from the point of join to the street, since you can only go from small to bigger down the stream, not the other way around.
If the street main connection is smaller than 6 in then you have not such option.
you are talking about 2 guys 2 day's work for digging and recover, material cost about 250 dollars.
