Height is most expensive and risky if you get LL or least expensive if you just get height lifts or elavator shoes.
Eye area is next most expensive or most expensive, depending on what you do for height, depending on your issues and the risks you are willing to take. I'd need more information on what's wrong with your eye area to suggest procedures. You could also cheap out and just get filler, though that'd cost more in the long term.
Jawline is probably least expensive most likely you will need a jaw implant, possibly some neck fat sucked out and chin work, either chin wing, genioplasty or an implant or both implant and bone work, depending on how recessed that area is.
For 20k you might be able to get a good surgeon to fix your jawline but not anything else. Or you could cheap out and go abroad and maybe get almost everything on the list done, but that's riskier.