Sounds like things are moving in the right direction. Congrats!
I think providing helmets is a great idea, as I bet many parents don't want to invest in one if their child just wants to try a lesson or two. When my daughter first started she was allowed to ride in rubber boots and a bike helmet for the first weeks, and we appreciated not needing to buy anything special right away. That place also provided helmets for lessons.
I wish there was a dedicated, passionate and organised instructor like your near us.
Best of luck with everything and keep updating!