Some community colleges coffer courses that are short in duration that can sometimes be useful for building or rebuilding your skills received during training that occurred in the past.

The usefulness of the training for your particular situation is widely based upon your existing skills, how you learn, and how the instructor teaches. We offered a 40 hour course for $525.00 that had people that had had never welded and some that had 8-10 years experience. All of those improved skills.

Lincoln Electric and other mfgs have training schools that have 1 and two week courses that I myself would love to sit in on, just to watch em teach. They may also be a great resource.