Porter, my reply was specifically addressing TB's GPS constellation failure scenario. As Awol57 says access to navaids for training is a whole different ballgame and I do realise the reduction in available navaids makes life difficult for training.
Why didn't the flying schools offer to pay for maintaining a couple of convenient navaids (CWS or YWE VOR)? For the student paying a fee for training use would have to be cheaper than dead flying time. Say it cost $100,000 a year then a $50 fee per training flight would easily recover the cost and save the student money.