I placed an order late April, and my ASICs went live early this month. Other expenses: a one-time setup fee of $2,208 for a 24 month contract, and once the ASICs go live, I have to pay $552 per month for my electricity/hosting fee. The fee will vary on the model(s) of your ASICs. I'd be paying less if the machines I purchased were S9"s as opposed to S19 XP"s.

Have not faced any operational issues yet.

I don't think Kaboomracks has their own mining pool. They don't take any of the BTC I've mined I mine to Braiins pool.