Find a new plumber.
Installing a new toilet is one of the least-complicated jobs a real master plumber has to do. These are guys who lug torches and snakes and lengths of pipe, and piece together complex arrangments of pipe fittings.
That anybody would be "afraid of a Toto" or, more accurately, "afraid of the unknown" is sad. And yet we see it over and over again on here from lesser professionals. A freakin' Do It Yourselfer and easily install a skirted Toto. Easily. Just follow the directions. Maybe it involves a little drilling (oooooh, drilling!) or actually having to measure something precisely (ooooooh, measuring!), but it's just insane that anybody who calls himself a plumber would find this challenging.
Terry says plumbers don't like to read directions. Maybe that's the problem.
In any event, tell the guy it's time to learn a new trick. Actually, to learn how to use his old tricks in a different order. And to read.
Or find someone else. I suspect that the guys who install Totos just laugh at the guys who are afraid to.
Our family plumber, when he saw that I had recently (by myself) installed a Toto, said, "That's a great toilet. Great quality. Great flush. We don't normally recommend them because people don't know the brand." I told him that people know it more and more these days, particularly upscale folks who have seen the in-wall tanks and such. "Oh, well I'll start recommending it then."
And the really sad thing is that the less-quality plumbers WILL install Totos. For a variety of reasons, we don't recommend on here that people buy toilets online. But, if you were to buy ANY Toto from a certain one of those vendors, you can in two clicks schedule installation for an extra price. The independent guys that choose to be part of that network of installers are doing it as a loss-leader to maybe find a new client, because that site doesn't pay them an amount of money that would be acceptable to a top-rated plumber, and so you are unlikely to get the cream of the crop. But they WILL install your Toto without whining about it or coming up with a zillion extra charges because it's a Toto, or they will be fired from the network. So, isn't that odd: the good independent plumbers with successful businesses will often be afraid of the Toto, but the guys hurting for business will pleasantly put one in.