+1 - don't use the GPS until after the rating is earned.
Don't know if ASRs are suitable for the non-prec or if they are available in your area, but that's 0 dollars for equipment.
If I understand your post, you have one radio and one vor head. You might consider another nav/com and ils+vor head. Intersection holds with one vor are fun.
For added pleasure install an ADF
Good Luck!