New riders should not buy any horse. They should spend the first couple of years taking English lessons on a trotting horse. That will develop better balance and a better feel for the horse. As noted on many occations the effective management of the soft gaits takes some skill. Building that skill on a trotter is much easier and quicker.
When they shift after a couple of years they'll also appreciate the virtues of the soft gaited horse.
My view is not always popular amongst the gaited folk, but there it is.