Usually this isn't a big issue if people are on managed hosting, because costs tends to be so much lower, and you can often overprovision more when you know it's a dev environment, while turning down number of instances etc.

The most important thing tends to be to make it possible to run services in isolation so devs can test individual services on their own machines. Then you'll end up with much more time-limited need to spin up larger environments for integration tests etc.

The most important part, though, tends to be to ensure you have a system to keep track of what is running and who is currently using it.