Reuse parts atx case advice

I’m on a tight budget and am new to unraid. I have an old atx case/power supply new SSD (2) 240 GB and (1) 120 GB and 1 500GB nvme card and drive. I want to additionally buy 1 6TB hard drive. (of course, ill purchase mobo/CPU and ram follow nas killer 4) Here are my 2 questions.

  1. can unraid handle this mismatched hardware?
  2. any advice on keeping the dollars down?

Thanks for any help or guidance you can provide on this. My budget is less than $200 no including the 6tb hard drive.

Yes, it can. Follow this deal set and attached guide, you won’t have any problems.