I am not necessarily the definitive authority on Japanese train fares, but this is what I found looking on
Hyperdia (you can lookup fares here for alternate orderings if you like)
Tokyo -> Kyoto : 13,910
Kyoto - > Nara: 710
Nara -> Osaka: 800
Osaka -> Kix: ~1600
7 day pass: 29,100
Based on current plan, not a win to get the nationwide JR Pass.