Is it worth buying tyres online and having them fitted locally?

I've been comparing tyre prices and the online options are noticeably cheaper than what the local shops are quoting me. The catch is I'd need to get them fitted somewhere, and I'm not sure whether workshops are happy to fit tyres you've supplied yourself or if they'll charge a premium for it. I found https://exoticautoservices.ae/tyre-shop-mussafah/ while looking into local fitting, but I'm weighing up whether the online savings are actually worth the hassle of arranging delivery and fitting separately. Has anyone bought tyres online and had them fitted locally? Did it work out cheaper overall, or did the fitting charges eat the savings? Also, what happens if there's a problem with the tyre later, do you have any recourse or does buying online mean you're on your own?