Kawaguchiko Station to Gora station (Hakone)

Hi, I'm currently planning a stay in Airbnb near kawaguchiko Station and planning to go to another airbnb stay in Hakone, which is near gora Station. May I know what's the best budget friendly mode of transport to gora? Thank you very much!!

1) Take the Kawaguchiko-Gotemba bus to Gotemba Station. Timetable is here:
https://www.japan-guide.com/bus/gotemba.html

2) Take an Odakyu Highway Bus from Gotemba Station to Hakone Sengoku Annaisho:
https://www.odakyu-hakonehighway.co.jp/common/pdf/english.pdf

3) Take the Hakone Tozan bus line S from Hakone Sengoku Annaisho to Gora:
https://www.hakone-tozanbus.co.jp/english/timetable/