Hey millenniumgirl! How's it going? I was thinking of you yesterday while I was working with my mare April. I've started haltering her and working her for just 5 minutes every day or so, having her lunge on her lead, chane directions a lot and yield front and hind to keep her in a good working attitude. I remember you said you could only ride her on weekends and I thought this might help you too. April gets attitude if she doesn't get worked at least twice a week, but that doesn't have to be riding and it doesn't have to be very long. Just 5 or 10 minutes of the above a couple times a week keeps her in good attitude.
I hope you are well and that I will hear from you soon!