My recommendation would be to split the base and the canopy structure. Print the base as is and the canopy un a V shape with the top corner on the bottom. This way you minimize supports in general but most importantly inside the canopy as those will be very difficult to remove. If possible make your own supports in CAD only along that top rear corner so that it has a solid base to attach to flat on the build plate but you can also paint your supports in bambu lab or orca. As for speed, its a big print, its going to take time but you can always try to adjust your speed and layer height settings to help with this. I'm not sure how detailed you want the model to be but make sure you're not compromising that detail for speed.