I would recommend not, unless it's the kid next door and you trust they will do it the way you say! Any "Pool Guy" is going to do things their way and probably not come out more than once a week.
Oi vey. Time to hire someone.
It depends on your results....Realistically, your slam may not start until the weekend... Prep work and patience (hard for me to say that) is required...
Do a full battery of tests when you get there so we know where to start..
This is my guess and plan of action if I was in your shoes (which I have been)
FC- 0-2
CC- 1-2
PH- 7.4
TA - unknown
CH - unknown
CYA- 0
Based on that guess of your levels, here is what my course of action would be for today...(pump running)
Add enuf bleach to get back to the 9 range.. approx. 1.5 gal 8.25%
Add 4 lbs of stabilizer... In a tube sock/pantyhose hanging in front of your return jet (4lbs will add approx. 33 CYA for 14700 gallons)
Squeeze sock every 15-30 min to help disperse CYA faster (may take about 2 hours to get it all out)
Scrub walls and floor with brush and net out any larger debris you can while CYA is dissolving. Backwash when necessary
Test PH - Record results - Add MA if necessary to bring it down to 7.2ish
Test FC - Record results - Add bleach to get it back up to 9 (wait 30 min before adding bleach if you had to add MA)
Chances are (and most likely) your CYA is zero. We need to get some of that into the water to protect the FC from the sun (CYA is sunscreen for Chlorine). CYA could take up to 48 hours to fully register but you can target 40 CYA for your Slam levels...
Well, I guess that answers it, you don't have any CYA. You definitely need to add some otherwise the sun will burn the FC before it gets a chance to work on clearing up the water.
There are two types of CYA, liquid is the most expensive and granules are the cheapest. It is sold under the key words as "conditioner" and "stabilizer" Can be found at some Wal-Marts, big box home improvement stores and if all else fails, a pool store.
Use pool math to determine how much to add and set a target for 30. Post what pool math tells you and we'll verify. Add a little less than what pool math says because it is easy to add, but you have to drain if you add too much. For the granules, put it in a sock and hang it in front of a return, squeeze the sock a few times a day.
Once you add the CYA, go ahead and set a target FC to 12 based on the FC/CYA chart found here: Pool School - Chlorine / CYA Chart
The more frequently you test and keep FC at 12, the faster it will do. Here are the full details on SLAMing: Pool School - SLAM - Shock Level And Maintain
You can do both but test the water first, post some numbers and we'll verify. So I guess, do the bleach first. Put 1.5 gallons in and let the pump run 24/7.