Where can I get affordable picture/template of log cabin living room for a relaxation video?

Here's a few resources I use.  

On the archive.org sit emake sure you check the liscensing because not everything is  free to use.

And of course wikipedia is a great source of images but again read the licensing requirements

Some are public domain or CC0 meaning you can use them for anything

Some CC1 attribution meaning you have to show where give credit for the image

Some CC1 are attribution and "share alike" meaning whatever you use the image in has to be

the licensing terms.

Research Creative Commons Licensing

https://pxhere.com/en/photo/1338927
https://pixabay.com/
https://archive.org/index.php
https://www.loc.gov/collections/

You can try to find some stock footage on Pexels (pexels.com)

Adobe Stock also offers a free 10 stock videos to users, you can try to check that out. 

You can find one with rain maybe.