As for afford, it is relative. This year I built a desktop PC with an i7-9700K, a GeForce RTX 2070, 32GB, a 500 GB SSD and a 4 TB HDD. I paid some $3,000 for it (considering the exchange rate of the time) despite having build all of it. And it was cheap, as I live in Brazil and prices here are sky-high due to taxes.
Considering that I paid that much on the computer, a $6,000 Mac Pro should not be totally out of range. But it is not even announced here in Brazil, perhaps because it will be so expensive after taxes that it will not be really attractive except for very few. The basic model, after taxes, will probably cost north of $12,000, which is more than three times the average annual income per capita. Our currency has devaluated aggressively in the last year, making the Mac Pro unaffordable even for the very rich. A base model with the monitor and the stand may cost some $25,000, as much as a car, and a high-end Mac Pro could end up costing as much as a house. It makes no sense even for large companies, which are usually on a tight budget here.
So, it is not affordable for me, and it will be hard to see one in the wild. Still, I never thought of buying one, as I do not fit in this particular market. But I can discuss whether the price makes sense or not.