We loved having one. But you do have to buy the stand and a special ham slicing knife. I don't think you could improvise the stand. You wouldn't be able to slice it without one. And you could use an ordinary sharp knife, but you won't get the same slicing effect.
It was delicious, and it was a party entertainment to have a go at slicing it. And no one was seriously hurt!
It comes with a stand. At least the one from Asda did. It says it lasts months but be forewarned it will be mould even with best of saran-wrapping. This is apparently perfectly normal and you just scrape it off. I must say it put us off it. We gifted one which was divided by several larger families and that worked much better as everyone had a manageable chunk for 2-3 weeks rather than a leg for months.
I've coveted one of these from Aldi or Lidl ever since a family Christmas with relatives in Portugal where my great-aunt had one on the sideboard. My idea of heaven is as much cured pig product as I can stuff in my face, but honestly, I don't think it's worth getting one for our little family of four, two of whom won't eat it at all.
Mould is ok, tends to form on the outer surface. I scrape it off choritzo all the time. I think if forming on the actual cut surface I'd be a teeny bit iffy. You might also get a white deposit forming which is more likely to be salts.
Had one from Lidl I think it was, last year. Was £30 and came with it’s own stand. There were 5 adults and we had so much left, I sent it home with DM. I think our problem was that we had so much other food, it was just another thing to eat and get through. Probably a good idea if you have a lot of guests.