In the main - producing something like that would not only require mappers to have a strong grasp on every RPG skillset (rare) but it would also prove quite expensive. I fully understand what it requires as a DM to put even a small one-shot together, often an 8 hour minimum especially if providing maps - but maps are very time-consuming to make on their own - let alone providing all of the additional details a DM is expected to provide that makes them the DM. If I understood how the coding in Roll20 works, I would attempt to import what I did for Fantasy Grounds, which was a gigantic random generator called 'Squareware' for absolutely everything a DM could need in terms of location name, area description, events, hooks, quests, npc generation and description, billions of random objects, traps, sounds, smells, wine, ambience descriptions, music playing, things and people in view, restaurants with every detail - even the means to simulate artificial NPC's in the case of a missing player - all done using nested roll tables and a clever interface that turns it into a control panel to get what you need as the DM. I built it so I would never need those kinds of details again - It started out as dice that I actually had manufactured, then turned into a monster of a beast which even has all of the CR tables, literally, Everything a DM's (me) could ever need or want. I'm currently on a mission to double the amount of my available maps by close of 2021 - from the present 1450, to 3000 but when I am done, I will try to learn the coding here and expand into that realm - coding is not easy to learn especially with so much else going on and no time to do it, and as I say it is a very rare individual who will be able to do what you're asking or provide it all in one set - not only that but it goes against all business sense to try and provide it. Expense, time, experience, creativity and people with every RPG skill are all rare commodities or hard to juggle for the end user. Often things aren't attempted because the cost involved of time vs income, does not meet needs.That is simply because maps, are not prized highly or priced in relation to the effort required to make one - let alone a thousand, AND then add on all the extra bits as well. Compartmentalization is how RPG works for the most part - we give you the maps, you provide the story hooks for your players. The simple truth is, RPG is very complex, has a lot of parts, and requires a lot of expertise - yours and ours, and always takes a significant amount of time to set up. There aren't really shortcuts or anyone that can speed that up, certainly not mappers who already have their hands full. On avg, my hourly rate as a graphic designer is somewhere between $45-$125 an hour (depends on client/job) - but I make maps almost entirely for the love of it and keep them inexpensive, not charging even close to what it takes time-wise to make them. Custom artwork for instance would cost someone around $180 a map if it took me a few hours, no-one, except corporate, is going to pay that or afford it - especially if a map gets used very briefly in one campaign (maybe a few times), but players play for adventure and adventure moves fast, quick and in unexpected directions all the time. Most end users expect to pay about 20c a map - the disparity is the reason no-one would be likely to attempt to provide what you're requesting because what we do is already under-valued, and I doubt any cartographers are eager to do an undermountain more work for an extra 20c. R20 take their share of that as well.