Nicehash is okay, if you don't mind pretty high mining fees (5% for payouts less than 0.1BTC to external wallets). The higher fees are partly offset by the fact that their miner always finds the most profitable coin to mine. They had a huge hack two years ago, and they lost lots of bitcoin, and many (including me) lost some of my mining profits. However they've been slowly paying back miners for the lost money. The fact that they've been around for a while, and that they try to pay miners back and do the right thing is why I still trust them. It's an okay way to acquire Bitcoin.

For lesser fees, I use Nanopool for Ethereum mining, and over the years I've had zero problems with them. You can then use an exchange with much lower fees to convert your mined Eth to Bitcoin. I like their clean interface, and you can see one of my miners (2x 1060, 2x R-VII) mining currently there: https://eth.nanopool.org/account/0xa63ffc523e284bfb4a09b46ed2336afe824c57eb

I wouldn't run 4x Radeon VII's in the bedroom unless you have earplugs, or are a very deep sleeper. Also, do you need to cool down your house with air conditioning units? Depending on the climate you live in, AC units can use heaps of electricity trying to cool down mining rigs, and that's why lots of miners choose to run them outside, in the garage or at the patio, for example. Unless you have free electricity, or live in a cold area where you want to warm up your house by mining, I wouldn't run them inside.