Poor little one. He's not going to like the e-collar but as long as he gets extra spoiling it's much better than the alternative!
If you use a liquidy staple like OHPW you can put it in the silo type feeders, I used those when I had an e-collared glider. He will be able to eat at one while wearing the collar.
You could probably make him a smoothie out of his fruits and veg and silo that as well.
Handfeeding is the ideal but it would be good for him to have some ways he can eat while you're sleeping.
I used a small Tupperware container, put on it's side, with lots of fleece blankets to snuggle in, since my girl didn't want to use any sort of pouch when she had her collar on. I also put the food/water silos close to the "bed" so she wouldn't have to travel far. If you have a glider treadmill, those work better than normal wheels for running.
Make sure your e-collar has foam tape around the neck of it so it won't cut into him. He will be miserable but he will get used to it.
If I think of anything else that might help I will let you know. We are rooting for you guys!