Is running a Bitcoin ATM business harder than it looks?

I’ve been researching Bitcoin ATMs lately, and something I’ve been wondering about is how much of the business happens behind the scenes. Buying a machine seems pretty straightforward compared to everything else involved. You still need a good location, enough transaction volume, banking arrangements, regulatory compliance, maintenance, and a blah blah...

I am kinda lost rn, so my questions:

What’s the hardest part of running a Bitcoin ATM business that most beginners completely overlook?

And if you were starting again today, would you still do it? And how if yeah?

Curious to hear some honest experiences. Thx a lot.