Hi ya, I have a 22 month old and prices are not too bad for the essentials. Nappies I find cheaper than the UK, same brands like Prima(pampers) huggies etc. Wet wipes name brands are about £2 a pack, but can get cheaper ones that are not branded. I haven't yet found nappy sacks, so bring a supply. With regards to food, most restaurants will make what you ask, but are really good with highchairs, childrens forks etc. Word of warning, your child will probably be given loads of sugary treats from the locals, including pure sugar cubes...lol!
Anyway message me if you need any other info.
Michelle