Do you mean this to be 3 different challenges? Are you just doing "Fast" in your current town and doing the others in different towns? Do you intend one town to do all 3?
As I first wrote this, I thought of 3 different challenges. Not everyone need to take part in all 3 of them. The reason was that I wanted this to be a challenge for everyone. I like the survival aspects of Banished; the fast version is "my game"; uneducated, organize a lot of building materials to build houses for every 10 years old girl, taking every nomad and don´t forget to have enough of food, fuel and tools. Since I know, that this is a kind of game many people don´t like, I added the other categories.
Personally, I don´t think I can manage all 3 categories in one town; at least not successfully. In my present game where I go for speed, I only build the cheapest houses and jam them close together to achieve some kind of efficiency by my silly uneducated people (in fact I can´t even manage to get as much building material as I want this way). A really prosperous town would show its wealth with large expensive houses, cathedrals, theatres, broad streets, fancy bridges..... RKEd gives you a lot of tools for this. I can´t manage that in this town. And what is beauty? Every town is beautiful in some way. I added that category because I see so many screenshots from really beautiful towns. They would probably not have grown fast and aren´t necessarily very prosperous. I simply added that category to suit players who want to focus only on the look.
Of course, a talented player could get a fast growing town beautiful and it can also achieve some kind of prosperity, but if I would go for the category "prosperity", I would start a new town. I don´t know yet if I will but maybe. Beauty is not so my game. I use to get bored fast when I try to design and use decorations.
So everyone is free to show us one or more towns. Each town can take part in 1, 2 or 3 of the challenges. It´s up to you!