I have only tried making my own mmf twice and both times were a bit of a disaster unfortunately. I would be afraid of not getting to practice enough with it before trying to cover wedding tiers with it. My biggest concern will be, since I’m likely going to be using satin ice, the fondant drying out/cracking. I have used red and black satin ice before but I don’t think I have used it a ton to cover entire cakes. Mostly just in detail work.. So I’m a little nervous! But I am going to make sure I get a lot extra in case I need to re-cover any tiers.