Lets say you just want to do just this scene here only. 1 sec animation 30 frames with audio. This is enough to do a 30 sec looping animation btw You can either add different camera angles like a close up etc. either as separate render or have it done in the 3D application.
You have the models and the environment as you got it from somewhere else.
If you have working with a studio experience amateur to average animation skill or hopefully years developing your skills, it'll take a few days. I'm not bullshitting you. The animation alone would take about 1 hour. lighting and then rendering and compositing in whatever editing software may take about 2 days depending on the system or pipeline of how you render, making room for whatever errors come.
1 day to render from maya, blender, cinema 4d, maybe 15 ish hours and another day to composite and render.
So yes, about 2-3 days if you know what you are doing.
If you're working on your own time having patreons, subscribers, etc. A month.
Rendering takes up a lot of time. If I rendered this scene 13 years ago I would be working on a PC with-
8 gig ram
i5- 760
gtx 780 (CUDA)
It would take 15-18 hours without errors and about 30 -45 hours with errors. Something always went wrong 40% of the time.
A 3 minute animation 3-4 months and most of the time is rendering as you can already see.
Edited: PS. that's how long with old hardware. New hardware renders way faster, maybe a month of rendering but it comes down to your build. also rendering in layers is faster than doing a complete full frame.