That’s the point though, none of our experts would make anything if their fees were unreasonable. They’re the going market rate for the level of expertise required by the task. You’re entitled to an opinion as to whether that fee fits your budget, but the market determines the rest.
To give you further context, a standard install is ~$100 dollars, what you’re asking for is vastly more complicated. a 5x-10x uplift is cost is relatively speaking a bargain.