I know new rigs that would be appropriate for the requirements. It's
VQ Hymera EMC1.
As I know, if you want to try it out, you shouldn't buy a full one. Just invest in a share of miner (CMMS), and get proportional benefits. For example, if you choose a module from EMC1 that have such specifics as power consumption 800W, hashrate 2850 on Ethhash, you could be completely free yourself from the burden of module services.
The company has partners who develop mining centers in low-cost electricity countries such as China, Turkmenistan, Iran, and Kyrgystan. It means that if joined to the CMMS program, you shouldn’t take care about paying electricity fees anymore. Because it has already included in module maintenance cost.