I remember a slide mentioning I think “up to 7.4gb/sec SSD read/write speed” or similar, which drastically reduces the pool of comparison SSDs. Intel Optane meets those specs, as do a few other brands I hadn’t heard of previously. In the later case, a 2TB version seemed to be $350-400. Take this for what it’s worth, but SSD is going to be more than $100 extra cost imho.