as a Brightonian to clear up a few things.
To my knowledge, the multi storey car park opposite the Rendezvous is free parking full stop !!!! It is like 30yards in front of casino and I was leaving my car there for 24hrs still in the summer. So, unless it"s changed recently, you can leave your car there as long as you want. There is a big ASDA that has it"s own parking where you have to pay unless your shopping there (maybe even if you are shopping I don"t know) but I don"t know the details for that as never used it.
also, if your staying in Brighton it"s like 15 mins walk along the seafront or probs £7 cab ride so likely still cost less than paying to park in town
DO NOT EAT AT BUDDIES. Once was enough for me and I was hammered post clubbing and still horrible.