If your product has dropped bright(Carbon/DE....)a 20 x 20 say 30 plate filter should be able to do this within a half hour. 40 x 40 w/K300(5m) & 1hp pump within 15min...just my opinion. Simple google or set up an account on ProBrewer.com and search New or Used equipment...filters are listed frequently.
I've used a diluted Acid #5 from 5-star(goggles & gloves)...spray on and wipe off. This seemed to work well on the outside of our stainless fermenters.
For or the inside of your condenser...yes, PBW then flush multiple times with H2O
My fermentations have yeast pitched at 78F and let them rise to 80F. All equipment is sterilized before pitching...a solid 5 days but I always give them 7. Adjust your PH, add nutrients & oxygenate.