I need to build a Raid 5 NAS system mainly for storage.

I am considering to use FreeNas server: what hardware would you recommend for a system with 5 HDD (total 3.5TB)?

I also have a pc sitting in my garage, not too old (quadcore, 8Gb ram, 120Gb SSD) but which has only three Sata access, so looking online I found this card: SYBA SY-PCI40010 PCI SATA II (3.0 Gb/s) RAID Controller Card (here the link) Do you think is posisble for me to connect three extra HDD to this card and create a Raid 5 system with a total of five or six HDD?

Thanks