I had a hot tub for several years outside on the slab.
I placed it near the electric outlet (it was a large portable, not a built in).
No bugs, don't even worry about it.
I do have a villa so it had a wall, which was nice for privacy.
I got rid of it only when parts of it starting breaking down and I got tired of fooling with it, both time and expense, mostly the aggravation, long story there.
I really enjoyed it and so did my wife. I don't really see any downsides.
Send me a note if you want to talk more.
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