I would prefer to run the build locally/myself, and to specify either a bounding box with lon and lat, or a country. The output would be data files and/or docker images with data. But as sibling comment said, if you plan to sell it, I understand it makes less sense to offer building logic.

I get why you created the monaco pack, it's a nice demo and fast to download and run. I would rather choose a big city where potential users live (london, nyc, the bay,?), but maybe there are technicalities that make that more complex.

Drawing box on a map in browser and generating the tiles, routing and geocoding db sounds quite heavy for backend compute. There was a project wiht a website that could generate a tileset (pmtiles file?) from box drawn on a map, but I can't find it now. There was a limit to the box size and if it was over some threshold, you had to have premium, or contact sales, or sth, I thought it was protomaps, but no tool like that there now.

Anyway really nice idea, I will follow your progress for sure!