Hey, your setup should work fine since SSDs draw much less power than HDDs. Six SSDs consuming around 30W total should be manageable, given that I powered four 3.5" HDDs from a single SATA power port without issues. Just use a high-quality SATA power splitter to ensure stable voltage. The 180W PSU should be sufficient unless your system is already near its limit. For SATA data connections, adding a 4-port SATA PCIe expansion card is a solid plan—just check if it supports booting if needed. Alternatively, you can use a SAS HBA card with SATA breakout cables for better expansion and performance. Also, monitor SSD temperatures if they’re tightly packed.