Silverstone ST60F 600W power supply, 3.3K -
https://amzn.to/3j0tKgq
Asus Tuf H470 Pro motherboard, 14.5K -
https://amzn.to/3xJEow3
WD SN750 500GB NVME, 5.2K -
https://amzn.to/3gMYjEQ
Corsair 8GB 3000 Mhz x 2, 9.2K -
https://amzn.to/3j9e0Yq
Intel Core i5 10400, 14.5K -
https://amzn.to/3gPeRvX
Considering 38K for 1660 Super, you can build the PC for about 84K
I have selected intel Processor because you can leverage Intel quicksync encoding to stream via OBS
If you extend budget, then you can go for K series processor and Z490 motherboard so that you have more headroom by overclocking