Yep, exactly. Very important to show the client what the actual PA is costing. Might put your price in a better perspective.
Even after I got my own PA, I still work with the rental company when I need a bigger or different purpose set (done two funerals last year as a sound engineer, don’t need subs there, but more speakers for a more even sound field and better speech clarity). And they always supply my PA for the big charity event in the Olympic Stadium in Amsterdam. I get a little extra discount there because of the good cause 😀 .
And be as long as you like, Santa, just toss in a few white lines from time to time.
Greetinx.