When I started out I found small doses of practice/playing helped with the finger pain. Ten minutes at a time, three or four times a day was easier for me than 30 minute or even 15 minute sessions. It didn't take long before a 'normal' practice session was doable.

I understand about disappointing the guitars (love that wording, too!). I have two quality instruments that deserve better. And I've promised and committed to be just that... :D