Stream Gamers? LOL! Jokes a part. preassuming that you have little good budget of 500$. There are a lots of suggestions are available on internet in this price range.You can go with any 3 seater sofas. They looks very nice and decent. Also, i found one article over internet so, you can refer to that. Cheers!
There are lots of monitors available under 150$ budget. For Gaming Monitors you need good refresh rate and good response rate. Here is one guide for you. You can refer to the same. Here i found some amazing reviews related to gaming monitors. Cheers!