The overall height is going to depend on the size of your pots. Take the vessels and burners to your welder. One thing I would do is offset the hlt and bk so they are not directly over each other, having the bk closer to you.
What are you using for your burner? If you are using a turkey fryer you can change your design to a 2 stand for your mlt and hlt while placing the turkey fryer on the ground. This saves a few bucks in the design that you can use for other gadgets like a stir plate.
Das Leben is zu kurz um schiess Bier zu trinken