I’ll throw out my prediction for your safety:
I don’t know if this will happen, but I would plan for it just in case…
Ratchet straps seem great for lifting but they release tension somewhat violently. You will be up on a ladder and each corner will drop fast and cause the weight to try and swing. Yes, your hoist will keep it from dropping far, but then you shock the hoist and it doesn’t take much swing to knock you off the ladder.
The weight isn’t the issue so much as the inability to release the whole thing at the same time.
maybe building a rigid spreader bar instead of using the yellow strap could get you closer to the ceiling and allow a simple release mechanism that allows the hoist to control all the weight? Maybe cut a “well” into the ceiling and mount the hoist up on the trusses instead of under them to gain more height?
Just please be careful on a ladder when you try and release this system. It might not be pretty.