There’s a huge variation in time/cost depending on where you live, the artist (how fast they work, how much in demand they are, etc), and so forth. That piece on the wrist can probably be completed in under 30 minutes by most artists, as it’s small, very simplistic, and looks like it’s solid black. The skin there is thinner and more sensttive, which is why you test a baby’s bottle/bath water there, so I imagine it would be one of the more painful areas to get inked. Then again, a lot of people get inked there compared to very few who get their knees/elbows done so you will manage I think.

As for the second piece, the time to complete that will vary a lot more, especially since it can be done in color vs. black & gray, detailed vs. simplistic, small vs. large, etc. It shouldn’t take most artists more than a few hours though imho. I’ve heard varying reports on pain in that area of the neck/back, but it shouldn’t be too bad. If you do the outer shoulder, it’s probably one of the least painful areas to get tattooed. The ribs rank as one of the more painful areas.

In any case, don’t let pain dictate where you get a tattoo. Tattoos hurt. Get it where you want it.

Black is the standard color when things are done in just one color. Unfortunately, some black inks tend to get a bluish hue over time. If you go to a top-notch artist though, you can be sure that they will use a quality ink and hopefully, it will stay black. You can do your part by keeping your tats out of the sun as much as possible and using SPF 35+ sunblock when you do go out in the sun.