Alright! I finally got this mod into a (mostly) functional state. This adds a building kit similar to Sleep Crate Building Kit; however, instead of using the existing assets for that kit, I made new frames. What this means is that I made new frames in different sizes, which solves the problem of having shit all in the middle of whatever space you're trying to make. Floors and walls are integrated into the frames, with walls able to be changed with a click.
There are also two sets of catwalks and two sets of platforms. The catwalks and platforms do not connect to each other, rather they connect to a special piece that dynamically changes rails depending on what is connected to it (the last three pictures show this). This is to cut down on too many connection points bogging down the building process.
There's more stuff, as well, such as crafting stations, furniture, walls, the Akila slum shacks, shipwrecks, etc. These are ALL designed to look pretty shitty (rust, dirt, weathering...). Also, all shacks, modular buildings, and awnings are sealed environments...I may do a luxury version in the future; but, this was a huge pain in the ass and I want to move on to other things...
Will be released soon, after I fix some things, add some things that didn't make it into the build lists, improve the user experience, etc.