You have two choices:
1. Buy a 2nd burner and a march pump
OR
2. Buy a hoist.
See my sig for my hoist, (invisible sculpture). I use 1 burner only with the hoist.
Your process with the hoist would be:
Heat strike water in keggle 1. Hoist keggle up and gravity drain into MLT, mash.
Heat sparge water in keggle 1, gravity drain 1st runnings from MLT into keggle 2, (you can get the height you need by hoisting up the MLT, if necessary, see pic below...).
Hoist keggle 1 up and gravity drain sparge water into MLT, hoist keggle 2 onto burner.
Hoist MLT and gravity drain sparge from MLT to keggle 2.
Edit: Hmm, HF doesn't seem to have the hoist I use anymore. Your choices are a
real hoist, or a
winch. The winch is cheaper, but isn't meant for "hoisting" so it doesn't have a positive brake on it to stop loads from falling. I found the winch is just fine though. I can hang my fat butt from it with no issues, no slipping.