Bill and Manfred,
Thank you for your explanation. So you are saying that the read/write performance of SSD is generally better than HDD. Do you guys also store your huge files there or you have a separate HDD or NAS or even SAN system to be the data vault?
The reason I'm asking is that as far as I know, consumer grade SSD capacity is usually much smaller than HDD, let's say below 500 GB. If you are using an SSD to store your files then it would fill up quite fast, wouldn't it?
Dave, while going all SSD is not really feasible now, it might be better to purchase an inexpensive, small-capacity SSD to become the boot drive and the drive where you place your image files temporarily. After you finished editing then you can transfer it to a large-capacity HDD, or even better, to a RAID 1 storage pool. You can create such a pool easily with Windows 10. For SSD, I'd suggest Samsung.
By the way, not all Quadro cards are expensive. For example, a Quadro K420 card could be bought for less than 150 USD, I believe. You still need a monitor that has a DisplayPort connector though.