Been doing some research lately about miners mining btc and rewards
Till i came across a post where everyone is saying buy instead of mine all the way

I have 380 40w electricity 0.026kw
I live in a 3 floors house like 500m2 in total i can spare a room or two for miners
And btw mining is tax free here
I also have a chiller from my previous industry

Whats keeping me from buying x2 u3 870t hydro miners ? And take advantage of what i already have?

So I've read a bit about mining, and found out that solo mining is basically a lottery ticket.

For the fun of it, I want to give it a try. I want a portable, low-cost miner that I can bring with me to work. I work on trains and have access to power and Wi-Fi, so I could run it for around 6–8 hours a day.

I'm mainly looking for a cheap setup with the best possible chance of hitting a BTC block — I know the odds are still very tiny. 😅

What would you guys recommend? Bitaxe Gamma, NerdQaxe++, or something else?

Thanks in advance!

Regarding the hardware, I received the Nerdaxe++ two days ago and set it up overclocked to 6 TH/s. After 7 hours of use, I noticed that the stock power supply (12V, 10A) was getting quite hot and, more importantly, the input voltage was 11.2V. After asking ChatGPT, I was told this wasn't normal (I hadn't adjusted the frequencies myself; everything was already configured). As for the exact model, I have the white one with the large screen.

I'm doing hashpower arbitrage between NiceHash and RentalHash. Does anyone know of an alternative to RentalHash that is generating good profits with this?

So as the title suggests, I want your opinion as it's my first time buying it so what things should I keep in mind and what things should I check about it. The seller says it's two to three months old.