The best reasonably affordable home measurement is a bioimpedance scale, but that also is sensitive to water fluctuations.
The best overall is an occasional DEXA scan, which is robust to water fluctuations.
Taking measurements is great. I haven’t heard about people measuring their necks with that frequence, but it is not like you have that much to lose. I would add legs and arms to your list.
I normally only weigh and keep measurements once a week, but I like to see the pattern of weight loss when I do fasts longer than 24 hours. I’ll weigh myself once a day during and a few days after to see what happens on refeeds. I’ll take measurements at least at the beginning and end. Maybe this is overkill, but I like reviewing the data…
I think I chose my measurement areas based on personal goals… But since I’m building muscle and losing flab at the same time, sometimes the measurements stagnate even when there are visual changes!
I measure calf, quad, thigh, hips, belly (at the bellybutton), waist (at the smallest part), under chest (ie: bra strap), chest, bicep, and neck.
I figure the more places I measure, the more I can see the loss!
I also use a Renpho scale which calculates body mass, water weight, BMI, and other stuff.
I take these measurements once a week, every Sunday when I get up…(although I do hop on the scale several times a week just as a check-in.