I doubt spending more will fix the build quality issue. Just get you a bigger griddle. I have a 4 burner and it’s fine. But it’s also required more maintenance in it’s few years with me than my mother in law’s gas grill did over 20 years. It’s just cheaply built. If that’s important to you I’d look at other options. Id even go so far as to suggest, since you already have a gas grill, just getting a plate to fit inside it. Works exactly the same way, doesn’t add an appliance.
I doubt spending more will fix the build quality issue. Just get you a bigger griddle. I have a 4 burner and it’s fine. But it’s also required more maintenance in it’s few years with me than my mother in law’s gas grill did over 20 years. It’s just cheaply built. If that’s important to you I’d look at other options. Id even go so far as to suggest, since you already have a gas grill, just getting a plate to fit inside it. Works exactly the same way, doesn’t add an appliance.