How Render charges
Render charges in two layers. The first is the workspace plan: Hobby is $0, Pro is $25 a month and Scale is $499 a month, each plus compute. Hobby includes one seat, 5 GB of bandwidth and 500 build minutes a month. Pro includes unlimited seats, 25 GB of bandwidth and 1,000 build minutes. The second layer is compute: every web service, worker, database and cache is an instance with a monthly price that depends on its memory and CPU.
That makes a bill easy to read and easy to grow. A web service at 2 GB is $25, a 2 GB Postgres is $40, a 256 MB Key Value is $10, and a persistent disk is $0.25 per GB a month. A second environment is a second set of those lines.