Investment Joy Laundromat Repair - What It Costs to Fix and Repair Laundromat Washers and Dryers

I made this video for Investment Joy's channel in early/mid January 2020. I decided to re-host the video on my channel, too, since the content was interesting. The audio isn't the best, as this was an early video I made myself (and that's not saying I'm a lot better now, but I digress).

Fixing one machine at a time is one skill, but what happens when you may have to look at 10 or 20 machines at once? Are repairs more expensive for these longer-lasting machines? Is it difficult to repair these machines vs. traditional machines?