In the Elementor Pro Advanced plan, you can install the plugin on up to three websites. If you are a casual blogger, this should be sufficient for you.
Additionally, you get access to 90+ Pro widgets, 300+ Pro widgets, 10+ full website template kits, the Elementor theme builder, the WooCommerce Builder, a pop-up builder, and premium support from the Elementor team.
A regular day's Elementor Advanced plan costs $99 USD. For the duration of Elementor's 5th birthday, a whopping 10% discount is available for the user who upgrades to this plan.