Getting a new cover will help. All you need to do about 10 September is cover it and wait for the middle of May. Don't waste money on doing anything after you put the cover on in September as you will be wasting money. My 35,000 gal cost about 15 gallons of bleach from Menards, couple of gallons of muratic acid, 12 -16 pounds of CYA and a lot of beer while i manual vacuum for a few days. I have a SWG so i also have to add salt.
All together this week i spent (15 gal * $3.83) + (2 gal * $8) + ($80 CYA) = ~$160. Pool is now ready (6 days after taking off cover) and waiting for sun to heat up as SWG is running.
I try not to keep track of beer costs..