Depends on who is going to be less expensive as both would be able to repair a PVC pipe. You doing the digging will help keep costs down.
Have you done any digging to see the leak?
PVC is very easy to work with and within the ability of most homeowners, maybe you? The guys at Home Depot/Lowes will explain it to you.
The key to this type repair will be exposing a good length of pipe so you can flex it a little to get the last slip fitting into place. I would think you want to see three to four feet of pipe on each side of the leak, but more is better in this case. Inch & a half will not flex as well as smaller pipes, so I'll reinforce, more exposed pipe is better. They do make some slip repair fittings but I'm not sure of their longevity being buried, others may chime in on that.
You wan the pipe dry.
The glue will not set right if there is water inside of the pipe, so if you have a slow trickle when the pipe is cut, go get a cup of coffee and let it drain completely out. I have rushed this part in the past and paid the price of getting to re-do my work later.
You want the pipe clean. Wash all the dirt off the cut ends to be glued. Dry them well. Use primer then glue.