Osaka trip with 2 kids

I¡¦m travelling to Osaka end of this year together with my husband and 2 kids (2 years old and 5 years old); tentatively my itinerary is as below.
Day 1 - Arrive at Kansai Airport @ 8:25am-„³ Kyoto
Q: should I purchase an Icoca & Haruka package and use it for the train to Kyoto? As I¡¦m traveling with 2 kids and with luggage, is it convenient for us to take train?
Day 2-3 - Kyoto
Q: 2 days sight-seeing in Kyoto more than enough or should I shorten 1 day in Kyoto?
Day 4 - Himeji Half Daytrip from Kyoto
Q: As I¡¦m travelling to Kinosaki Onsen, should I buy Kansai WIDE Area Pass to travel to Himeji?
Day 5 - Nara Daytrip from Kyoto
Q: can use Kansai WIDE Area Pass?
Day 6 - Kyoto to Kinosaki Onsen, use Kansai WIDE Area Pass and spend 1 night
Day 7 - Kinosaki Onsen to Osaka, spend the remaining day and the night in Osaka.
Q: is 1 night stay in OSAKA too short?
Day 8 - Depart from Kansai Airport @ 11am
Also, pls recommend Ryokan and hostel for our stays in Kyoto, Kinosaki Onsen and Osaka.

Thanks!

1 night stay in Osaka is sufficient unless you love your shopping.
2 days are not enough for Kyoto yet alone one day
Buy the Kansai wide area pass if you are using it to travel to Nara and Kinosaki Onsen and back