Any chair height, elongated bowl will be just fine. Don’t get hung up on skirted or one vs. two piece.

It’s funny how quickly some folks are so quick to spend other peoples money but i would bet when it comes to their own projects they don’t open their wallets so easily. The old saying you get what you pay for doesn’t always hold up in this day and age. I’ve had good work and bad work in EVERY price range and a high fee is not a guarantee of stellar workmanship.

where have you gone Joe DiMaggio?

I would get another plumber as a skirted toilet is significantly more attractive and easier to keep clean since there are no swirly things to catch dust.

I also opted for a one piece toilet as I didn't want a crack accumulating grime over the years.

I can't imagine why a skirted toilet would be more difficult for a plumber of normal skills.

A one piece toliet is a bit more difficult to install because it is heavier and bulkier. However when I remodeled and installed skirtless one-piece toilets neither my GC nor any plumbers indicated they were an issue to install.

A skirted install is different. And for some people that makes it more complicated. Let alone that lots of people who call themselves plumbers really aren't. (Like many of those who call themselves "architects".)

Here's a Kohler install, at 3.30, of their skirted model. This would be trickier on a re-model where the floor is not perfectly level. Also, not all systems are as sophisticated and easy as Kohler

Kohler skirtless mounting system

Kohler slick concealed trapway model costs less than fully skirted designs.

It is more difficult to install a skirted toilet than a non-skirted one. Compare, for example, the Toto Aquia IV installation instructions with the Toto Drake installation instructions. The attachment of the bowl to the floor and water supply to the tank is much easier for the latter because everything is exposed.

(I highly recommend the Toto Drake CST744S#01 Two-Piece Elongated 1.6 GPF Toilet which, though discontinued, is still available on Amazon and perhaps elsewhere. I have two and they flush well, are easy to clean, and were easy to install (I did it myself). It's NOT skirted, however.)

Whatever you do, don't get one of these ADA (aka "chair height", "comfort height", "right height") toilets. They are awful. The seats are too high from the floor impeding one's ability to "go".

Here's one: Swiss Madison SM-2T220 Cache 1.6 GPF Dual Flush Two Piece Elongated Toilet with Top Hand Lever – Seat Included

Whatever you do, don't get one of these ADA (aka "chair height", "comfort height", "right height") toilets. They are awful. The seats are too high from the floor impeding one's ability to "go".

Depends on the user!

By chance, four were installed in our current home by the previous owners, two physicians who renoed it. They're an unplanned pleasure for my bad knees. But, of course, not everyone's diet is roughage rich.

That Kohler moder that worthy shows above that is not skirted looks good, it is not all convoluted looking on the outside!!