Modern Waltz. 28 bars a minute. will equall 1 second each beat. As there are six half beats. in one bar of music. And six moves. Do we count it this way. 1/2 sec. to step. 1/2 sec to draw the foot up and turn. 1/2 to put the foot to the side. 1/2 sec to draw the feet together.Now I have 1 second or 2 1/2's to rise and fall. Can it be any other way and still comply with the technique book

Hi Anna
At 30 bars per minute and 3 beats to the bar, you have 90 beats per minute, so each beat is only 2/3 second. It'll be very s;lightly longer of course at 28 Bars per minute.
The rest of your question is more complex. I think you have it pretty well correct, though many would argue with some of the details.
For example, the technique book says "lower end of 3" (this would be for 1-2-3 natural turn, for example)without saying exactly when this is. Perhaps it's as well it's not too tightly specified. Most would lower on 3&. But again, the technique book only refers to foot lowering and not body lowering (am i right on this?)

"For example, the technique book says "lower end of 3" (this would be for 1-2-3 natural turn, for example)without saying exactly when this is."

That is lower at the end of STEP three, not the end of BEAT three.

Even if you make the assumption that each step takes exactly one beat, there is absolutely zero evidence to suggest that beats align with steps. In fact, there is a lot of evidence to suggest that steps begin and end somewhere around halfway through each beat - that would put the weight change which is approximately the midway action of each step on the downbeat, and would have us counting steps in terms of beats as and-one, and-two, and-three.

In another thread somewhere, we agreed that the technique book doesn't define the relationship between steps and beats.
So i dance the way virtually all dancers do - plant my right foot (as in right foot forward at the 'start' of waltz natural turn)on beat 1. By the technique book this is halfway through step 1, but that doesn't matter. I'm not going to drive myself (and my partner)bananas by trying to step on beat 1&. The judges wouldn't like it either

Anonymous.There is an and at the end of three. You have put an and count at the beginning of one which belongs with the bar of music just gone.
Just something alse to argue about. There are teachers who very sucessfull teach at a very high level, who count the Foxtrot in threes, thats steps. Have Fun.