I have tested the original Bananapi, it works pretty well can handle many concurrent calls Also use a high quality sd card to avoid data corruption, I didn’t thought it and had my mysql screwed up. The community and the support are small compared to raspberry and I think it’s the biggest flaw. Also the company that makes them is kinda shaddy, they had some dispute over the project with an online retailer or something like this.There is also OrangePI, even cheaper.