I really appreciate all of the replies. After doing some additional reading spurred by various comments here, I've realized a couple of things. First, the suggestion to have a professional do it is a good one and might make the most sense. Second, I do appreciate a good photograph and since I like equipment of all types, I'll probably do the boneheaded thing and forge ahead anyway with some decent used equipment. To that end, after a hot sweaty day, I called it quits early and went camera shopping. Best Buy has almost zip. Pawn shops have zip.
Our used camera shop didn't have what I was looking for, but I did learn some more stuff from them. They said that Nikon customer service was awful and that they recommended Canon for that reason alone. Also that Nikon had been having financial trouble recently. I did buy a Manfrotto tripod as suggested; they had a used professional-grade one for $139 and sold it to me for $125. It's got a head on it as well. Heavy thing and really smooth. They also said that parts availability for used cameras was about 5 years after production ended, and that what goes wrong is the shutter. It has a definite service life. Also that most / all good DSLR's have a shutter counter in them so you can get an idea of usage.
They had a Canon macro lens, I think it was 55mm, and it was $500. I didn't buy it. I have to read more and see if that's what I want and if that's a good price.
My research after the fact says that maybe I want a Canon 6D body. I also have about $15-$25k worth of stuff I want to eBay, and a camera like this would be good for that too. Need to figure the lens out before I go further. The eBay stuff would be max 4' long x 1' wide and tall. It's looking like I'll spend as much for a lens as for a quality used camera. And altogether will be in it for the price of 1-1.5 6920's. 1.5 for sure by the time I figure lighting out. But overall a small price to be able to advertise hundreds of pieces of stuff for sale with quality pictures. Plus I'll have another hobby with gadgets, and I do like gadgets.