vraiment

Hi, I'm trying to put together a new NAS for my personal and family files and while I'm not a newcomer working with servers I'm new to unraid. My long term objective (5-10 years) is to mount a personal cloud with my own VPN server and services that I host with a dedicated machine for VPN, compute and storage in a rack. But for now I need to put together something quick as I no longer trust having my personal computer with with them. I rushed and I bought a recycled PC (Dell Inspiron 3847): CPU: i5 4460 RAM: 8 GB DDR3 Mobo: 88DT1 088DT1 CN-088DT1 PSU: L300NM-01 (from Dell) For hard drives I was going to use a WD20EZRZ for parity (which is where my data is currently stored), a Samsung SSD 860 EVO 1TB for caching and a couple more of spares I had lying around but one started failing so I decided to grab two Western Digital 1TB WD Red Plus and SanDisk Cruzer 16GB for the OS. I expect to replace the recycled PC with better hardware in the future, the hard drives may stay but everything else probably will get a new home. I also want to buy a very high quality PSU to ensure I won't lose my data due a the PSU that comes with a recycled PC (I don't know if the included PSU is good or not) and that's when I started investigating and realized that it may be worth to ask for guidance for the whole system. I'm looking for: General feedback, is there a red flag with this setup that I'm not aware of? Is the single SSD good enough for caching? I've read that is better to also have multiple caching disks but I don't have the SATA ports to add more. Should I update the PSU? What is a good and cheap expansion card to add more SATA ports? I've read conflicting posts on what I should use. As for the guidelines for a "new build" thread: What is your budget? Hopefully 0, but I'm willing to spend couple of hundred USD for a high quality PSU I can keep using in the future. I'm also willing to pay (less than 50-30 USD, hopefully) for an expansion card I can keep using in the future. An additional word here: When I upgrade to the final version of this I hope to use a machine in a server form factor so I don't think the PSU can be reused in that case, but maybe the expansion card would. How many drives? How much capacity? Right now I need to hold around 600 GB of data. As I mentioned I have 2x1TB HDD a 1x2TB HDD and a 1x1TB SSD. Is expandability important to you? If so, what's your long term goal? Yes, but not that much. I expect this in the long term to grow maybe to around 6 TB. I'm more interested of the swapability. If I get a new proper server, I should be able to just get my USB and drives into the new machine and get it working, right? Are you interested in running additional apps? If so, which ones? Be specific. In the short term, no. In the long term I'd like to have an additional server for apps (like Plex) that reads from my NAS. What do you plan to run for hard drives? See above. Do you have any spare parts laying around that you would like to apply towards your build? This includes drives. I have an additional 2x4GB DDR3 sticks for RAM but the MoBo doesn't have the slots for them. I also have a couple of Kingston 250 SSD I could use if I had more SATA ports. Thanks in advance.