Private Pilot :
Requires at leest 3 hrs dual XC day.
Most require more.
Dor the night requirements I used to do everything in one flight.
First leg at least 50NM then bunny hop your way back using couple more airports with landings at each.
All is now XC
So PPL - 6hrs

IR requires a long XC
Jeppesen syllabus has two short ones prior to the long XC.
A 50-60 mile there and back along airways with two approaches can easily be done in 2hrs.
So that’s 4 plus the long XC which is also almost 4 hrs.
So that’s 8 for an Instrument student.

Commercial student has the 2 hr day and the 2hr night which you can do in a there and back flight.
So that’s 4hrs.

You’re looking at about 50-60 students.

For a little bit more advanced work:
Never ever let the student pay for he flight they don’t need.
However, if you do an Instrument approach and the IAF is 50NM from your starting point you can log it XC.
Design a Flight review profile with a XC leg in it. Way too many FR’s never leave the pattern. Use the guidelines on the FAA website.
Design an IPC that involves flight on airways and an approach to a landing at an airport 50NM away.

Be the first one to volunteer to pick up a stranded student.
Be the first to volunteer if someone wants to go somewhere.