yeah, i know a few things. comfy city, except for all the sea gulls that need to be genocided. off the top of my head
1)don't go to meden rudnik
2)if you get to pick a hotel, you can pick one in a neighbourhood like slaveikov or lazur. you'll be like a 15 minute walk away from the seaside and you won't need to pay seaside prices. and if you're looking for a place to have a walk in, go to the sea garden "morska gradina"
i've been there and i know a guy from there, so if you have specific questions, post em and i'll get you the answers.