Hi Jennyroper. Firstly, congratulations!
I think the prop feeding would work very well for you. When they were a bit older and I was on my own a fair bit I would prop feed both at the same time for some feeds (when I was exhausted). I'd put them both on the sofa with the bottles propped on towels/cloths/pillows/muslins and then sit in front of them with a cup of tea. When one needed a wind I'd pick her up and the other one would glug merrily away. I'd then let her finish the bottle and wind the other one. It worked really well and was far less stressful for me than trying to juggle two wriggling babies.
I never used the podee bottles but I know of people who have. They require a bit more 'suck' than normal feeding bottles but apparently babies get the hang of them quite quickly. Given that, they might be better for slightly older babies who are stronger and find feeding easier, but it would be something that you could build up to and keep trying with. It could work quite well in tandem with the prop feeding method.
You might get people recoiling in horror at the thought that you are meanly, not holding your babies whilst they feed, thus missing out on crucial bonding time, etc., etc. but I would ignore them. I found with twins that it was all about muddling through and, as such, All Bets Were Off!! My life was no longer 'normal' as it might have been with one baby and so therefore I needed to get inventive and devise ways and means to get me through. And although I didn't always get to have that nice one-on-one time when they were feeding, they got heaps of hugs and affection from me at every other moment and they seem non the worse for it. In fact, they are incredibly happy, jolly little girls.
Definitely try the podee bottles - they were my next port of call if the prop feeding hadn't worked and been such a success and I think given your arm paralysis it would be really helpful to have as much equipment that will help you with hands free feeding that you can.
HOpe this helps.
Kx