Sounds like you've got a system that's working pretty well, and are saving on the expense and inconvenience of diapers. I hope you'll allow for regression, though. For children who train this young, it's not usually a "once and for all" attainment.
There often comes a time, weeks or months later, when a child's patience with or interest in the process collapses, and then its up to the parents to either back off and give the child more time to mature, or to persist and become the enforcers of the potty. This, of course, is not actual training, in which the child becomes a person who uses the toilet as a matter of choice. And it's not a terribly positive situation, because the child may develop issues around power or failure, which slows the advent of true readiness.
Regression may start after some change in schedule, the arrival of a baby or other change in the family dynamics, illness of the child or other family member, a change in daycare… or sometimes after no change at all. This little person simply has had it with the demands and expectations and goes on strike.
What if you were to just keep on with the relative convenience of your current approach? That way, if your daughter begins to show resistance, you can gracefully back off before it becomes a power issue. Elimination is one of the few areas where children can express their unhappiness with being pressured – and they do.
Every child eventually wants to be potty trained, and successful "for keeps" training averages 2 1/2 or older for girls, and often older for boys. When they are both physically and emotionally ready, training can happen very quickly, often in two weeks or less. If you enter "potty training" in the search box, you'll find stories from lots of moms who tried to train early, had to give it up, and then had their kids inform them they were ready.