To any private coaches, how do you manage / budget cage fees?

I've taught a few private lessons, and I want to start doing more sessions / getting more clients. I want to know how other coaches deal with cage fees / pricing?

I live in a big city, which means you either have to jockey for limited and expensive cage time, or hope you can nab one of a limited number of public park spaces.

How do you budget cage fees? Adding $70 for a 1/2 hour cage rental on top of the price of a lesson makes for quite a pricey fee to charge parents. That seems wrong somehow? I certainly never shelled out $100+ for a 1/2 hour lesson growing up.

Any tips for that, on top of managing scheduling with students on top of reserving cages would be greatly appreciated.