You'll run out of reagent if you got a smaller test kit!
I just finished my SLAM & had to go blind for a week :\
You can also buy separate reagents for the Chlorine test alone - so i'd do that.
Your pool is pretty green so there will be a LOT of algae....
Skimmer sock (so you dont fill up the filter & have to keep backwashing), & a manual vacuum & brush - they'll be your best friends for the next fortnight.