Anyone Used A DIY Chocolate Fountain

I really want a chocolate fountain at my reception, but they`re so expensive. I`ve seen sites online that you can rent them from. They just mail it to you, and you set it up and then send it back. It`s way cheaper. All of the places around here, you have to pay for an attendant to help with it, so it costs a lot.
Has anyone used one of those do it yourself choco fountains? Was it messy or complicated? Please help!