It is true commercial versions are slightly more expensive. But this is the tradeoff of buying something more durable and meant to be used continuously.

But it's not true that they are difficult to buy.

For my two examples: Commercial washer/dryer sets available through any appliance dealer. Commercial hospitality TVs and other commercial electronics are available via Grainger.

Might be a regional thing. Here where I live I don't think it'd be easy to find commercial or industrial grade appliances for domestic use