I think you would crazy to use an F550 frame for any payload like this. In its day it struggled to carry a GoPro, gimbal and battery. You need something bigger. Ideally an X8 or a heavy lift quad. If you are in the US I may have something on my wall that would work. An Ardupilot powered DJI E1200 mapping quad that will work with this payload easily. Needs a home.
This one: DJI E1200 Quad for sale