The fastest currently available ssd device will be a Intel optane.
The 900P is a bit pricey, but if this is for a money earning endeavor where performance is king, there is nothing better.
https://www.newegg.com/Product/Product.aspx?Item=N82E16820167440
A more normal Samsung 960 PRO will cost half that.
On ram. the important thing is to buy enough to hold your active tasks.
Look at what you have today, and buy a bit more. If you do not today have any hard fault numbers in task manager, your ram size os ok.
My guess is that a 2 x 8gb kit is fine.
Faster is better, but not by so much as you might think. I might guess 3600 speed is about right.
As to the processor, quickness will come from fast single thread performance.
Today, you can best get that in an 8th gen intel processor.
I3-8350Kwith 4 threads, I5-8600K with 6 threads, i7-8700k with 12 threads.
I might think the i5-8600K would do, but if the extra $130 for a I7-8700K is not a bother, go with the i7-8700K; there is nothing better.
All 3 K processors will overclock to the 4.7-5.0 level.