I use a refinished mini pic Dell Optiplex, see link below for ~ 250 US$

I5, 16GB ram, 1 TB ssd

I suggest you to use your old PC, it'll work just fine 😉 for your needs. No need to buy new hw.

https://www.ebay.com/itm/285066977727?epid=19053909408&hash=item425f50e1bf:g:0IEAAOSwECZiA4Fi&amdata=enc%3AAQAIAAABIMR7C0lv98vlt4w9y1%2BRERasf3KP7DQlJw8DFrFmYpmMgty8%2B643iKuPw5%2FTaF1qeLXehTL2P6q6dSR%2FrgAac0ZWoRynOUaY2WqaB6KeWFKCo6ZBnIHDCKAQ3P2aMTnfcndHdlrYsr98Sxpe3C%2FlKtBL8KWUS5Nzk69VMp3t3Xq1lShOzWUDSYR%2FtyOBqQOusTH6esgXXRKEf2UEIVnQisoU36kWN5SCF1WzD%2FOIhb%2BYtBljtIKOs9zXtTw7RYa5Qn8c43HJ9%2FTSpGzjOzoxtT6HoNRDKMerW3rR9R5Hru%2Bup39K%2FaypfVWg7ioeGfFHbO8CPznHMT%2FqWaMSJwvERHnMf4qma93Ssez8hejZrJNlov8kMFfQJQLNuL6NDLCtsg%3D%3D%7Ctkp%3ABFBMouGV4PVh