Sundance offers wide open skies, great soaring, wonderful people to fly with
and laid back New Mexico ambiance. Warner is a big, private airfield far
from heavy air traffic with great soaring weather. Marfa is a legendary
West Texas soaring site run by SSA Master Cross Country Instructor Burt
Compton. You can't learn from a better master.

I agree: Burt's and excellent instructor.

He has a cabin that you can rent for your stay. Marfa's elevation is almost
5,000ft. and the summer temps aren't terrible. Big Bend National Park is
nearby as is Fort Davis State Park and the McDonald Observatory. Great
scenery. Boomin' thermals.

Depending on where you're coming from, it can be a bit of a drive. Minden
has the advantage of being close to a major airport. Marfa is 3.5-4 hours
drive from Midland/Odessa International (served by Southwest and
Continental).

Yes: you should be able to knock out your rating in a week if the WX
cooperates.