you should read the Washing Machine "Salad Spinner" tek thread.
if you can get the solvent off fast enough, -20C will give acceptable quality. which is where the panda and the bubble bags come in.
have you read Bucket Tek (Cold Ethanol Extraction on a Budget)?
Edit: and someone should point out that extracting keif with EtOH can be a bitch…
https://future4200.com/search?q=kief+bitch
Edit: I paid $150 for a used -40C chest freezer that holds three 15gal beer kegs with ease. Finding it took a little time, but it eventually showed up in my inbox one morning using an RSS feed like this one https://maine.craigslist.org/search/sss?format=rss&query=freezer&sort=rel I wasn’t specifically looking for a -40C.