Steve B wrote:

You haven't said how high your form is - I'm still assuming
that it's 3" high

Form is 1.75" high.

You claim that your form has a surface area of 2 square feet, and it has
a height of 1.75 inches.

That would give it a total volume of 0.29 cubic feet.

That much concrete would weigh 42 lbs. A single 80 lb bag of pre-mix
could easily fill 2 forms.

What is the length and width of your form?

Is it 2 feet by 1 foot? Or is it 2 x 2 feet?

Need to do 800-1,000 sf.

If your form really is only 2 square feet in area, then you will be
using it 400 times to give you 800 sq feet.

It will take you a minumum of 10 minutes to mix one 80 lb bag of premix,
and another say 10 minutes to pour it, smooth it, remove the form and
set it into a new position and pour the remainder of the mix, smooth it,
remove the form and set it into the next position. That's 20 minutes,
and you'll do that 200 times. If you get good at it, let's say 15
minutes. Times 200 is 3,000 minutes or 50 hours. If you can do that
for one 6-hour stretch during a single day, then it will take you 8 or 9
days.

But getting back to your form. 1.75 inches isin't very thick, but I
suppose it's thick enough to support people walking on it.