We train ours.
Members who have at least Private Pilot ASEL and at least 200 hrs PIC and a glider rating may volunteer for tow training.
We have access to a C-170, before that it was a Scout or Citabria.
The tow candidate must pay his way to a tailwheel endorsement. Normally that means buy the fuel.
The tow candidate must invest some time to take the SSF tow pilot course, read the books, and study our tow ops manual.
We have to like the way he behaves on airport and how he flies gliders.
Instructor review of logbook, certificates, medical, aircraft POH and ops manual.
We tow with a Pawnee, if all above passes muster he gets some "simulated" tows in the C-170.
He get gets a cockpit check in the Pawnee and monitored while he completes at least 10 full stop landings.
His last three takeoffs are at reduced power to simulate the climb pitch angle and climb rate with a glider behind.
His first three actual tows are with a glider instructor in our heaviest glider. Normal tow, beginning student wild tow and a controlled tow with box wake and slack line maneuvers, and a pattern tow.
His first few days towing is monitored by other tow pilots and glider instructors.

BillT

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Min qualification, member dues (I'm assuming), pay for training, rigourous training course, simulation, reduced power (flex) takeoffs, pilot monitoring, fly for free, held to high standards,... and on your schedule. That's it?
Where do I sign up!

Bill, you're perfect for airline mgmt. Oh wait, do I already work for you?

No offense meant of course, just for fun

Hunter