I breastfed my boys until they self-weaned a little past 2 and 2 1/2. Also triple-tandem nursed my older DD during that time (she self-weaned at 3). And I had all three by cesarean.
My boys never had pacis or bottles, and neither did my daughter.
So...yep, it can be done.
I'll warn you that you'll likely get a lot of crappy advice even from LCs. I was already an experienced nursing mom when I had my twins, so it was easy for me to tell discouragers and interferers to beat it (even if they were 'experts'). I strongly advise getting in touch with a local LLL group, and ask them to specifically put you in touch with someone experienced with helping multiple mamas or (ideally) someone who's done it themselves.
You probably will not need to pump...unless you want to, and if you need/want to, if it's short term you can rent a pretty good one from the hospital for a few weeks, in most places.
You don't have to supplement. My boys did not even eat baby food, they nursed exclusively until they were ready and wanting table food, a little over they turned 1.
You don't need any special equipment, though an EZ-2-Nurse pillow is nice IF you like feeding them at the same time. Some people (like me) don't like the sensation and it's okay. Many times if you find a good LC or doula they will have some nursing pillows you can 'borrow' to see which one works best with your body and for your needs.
Having nursed twins and a singleton, I didn't feel that nursing twins was that much more work per se, but you do need to be VERY VERY sure that you are eating and drinking enough. I didn't eat enough and dropped almost 80 lbs in 6 weeks after they were born. That sounds good, but...I felt like week old cold dog poop that got run over my a mack truck, and my OB was about ready to force feed me milkshakes. Once I made sure that I was getting enough protein and water, I bounced back and felt sooo much better. Smooth sailing feeling-wise from then on out.
If you can at all possibly afford/beg/borrow it...get a very comfy recliner (I LIVED in my La-Z-Boy the last months of my pregnancy and the first 8 weeks of the boys' lives).
Don't let people tell you you can't do it. Particularly if. ahem, they've never had or nursed multiples themselves. Do your own research, hire your own team if you can, and learn how to take other people's intrusive comments with gallon of salt.