Hello,
do you want to keep cms/framework the site is currently built with, or keep it for everything except sliders/offers, or completely switch to a new one?
I can do the task with Symfony (which is best if you do want to extend it in the future), the quote is for those 2, but whole port won't be much more expensive.
The only requirement - you need to have ssh access to your server.
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Regards, Oleg