Those setups are great for running small appliances, lights, and electronics - I run similar for my cabin weekends with about 500Wh capacity which is pleny for charging devices and some LED lighting, but arcade machines can be power hungry depnding on the model! You might want to check out gearscouts.com to compare power stations if you’re looking to build something similar - they break down the $/Wh value which is super helpful for DIY solar projects.