If you are going to enter a lottery, it makes sense to buy the cheapest possible ticket and enter as infrequently as possible.

Why? Because there's no rational basis for entering a lottery. It relies entirely on magical thinking. You are effectively polling for the existence of a personal luck deity. There is no need to use a complicated, expensive system for this.

A single $1 ticket, purchased annually, will suffice (this is available in Australia).

In the infinitesimal chance that the magical thinkers are correct, this single purchase will be sufficient for your personal luck deity to respond with the appropriate riches.