Some of my followers tend to think this took 3 years to make. It didn't. I made the animatic then 2 years later decided to animate it cause I just wanted a project to work on. It took a year for the animation itself, then I went back in and added shading (frame by frame) and lighting and animated several backgrounds (including the rotating stage scene).
People usually don't think about compositing as a part of animation, but I also had to take all 80+ scenes and put them into one file and make sure the music was synced. Which was difficult because after effects isn't a video editing program and the audio scrubbing sucks.
Because Frisk and MTT are such simple designs, my roughs ended up being very close to my finished animation without much fixing. If the character designs were more advanced or sophisticated I can't imagine how much longer this would've taken. (Plus, I had been drawing MTT for years at that point, so I was very familiar with his design in 3d space.) I noticed a big difference in the character drawings between the animatic and rough animation and I feel like I improved a lot, which makes me happy c:
Budget breakdown:
$1,000 for permanent ToonBoom Harmony Advanced license
$500 for my backgrounds artist (+ some gift art I made her)
$21 for one month of AfterEffects
$2 for a chromatic abberation effect I bought to use when Frisk got zapped
I didn't get paid to do this, it was a labor of love