Hi Saxa,
I recently went out and returned on a Sunday. There are local buses in Corfu Town (Blue bus) but no longer distance (Green bus) on Sundays. Here is the link to the timetables:
http://www.allcorfu.com/ou-buses.htmlTry using Trivago.com, Bookings.com or similar to find a hotel. We have stayed at the Mon Repos Palace and Hellenis hotels in Corfu Town for £25 per night for 2 with breakfast. Both were ideal for a stopover and the Mon Repos quite luxurious with a complimentary glass of champagne on arrival too!
A 1km walk from the hotel to the Green Bus station on Monday morning, €4 per person from the bus station to Arillas and great views en route. Bon voyage!!
Jez