When my twins were this age I was doing it alone and also had a 3 year old to look after - I would make lunch for my and my DS1 the might before and put it in the fridge. Ds1 had his own shelf low down in the fridge where I put bottled/carton drinks for him and fruit in case he needed something while I simply couldn't get up because I'd only just managed to settle the twins.
Luckily you wont have to worry about this but instead can do yourself some easy to grab bits prior to being stuck..
Mine are EBF which (although they still wake too often at night) I find much easier than having to get up to make bottles.
Although tips for easier bottle feeding - prep as many sterilised bottles as you can with cooled boiled water and keep a kettle close to your bedroom (if you're upstairs/far from your kitchen somewhere safe and not in the bedroom) using mostly cooled water will mean less warming/cooling time for bottles.
Do you have a perfect prep machine? If you are willing to pay postage I will happily send you one for free, though it is used it's still in good working condition.
A feeding pillow can be good for babies with reflux - although mine are BF they had terrible reflux to start with and I used to put them in their pillow after a feed to keep them somewhat upright.
(The big padded E shape pillows) though have to be careful to make sure their heads aren't flopped forwards, try tilting their heads back a little if anything, a simple bit of padding under their bottom will help this if they're too small for that without.
If you're bottle feeding then they can be fed while sitting in the pillow and left there if they fall asleep feeding?
If you find anything that keeps them quiet for w minute use use and overuse!
My two found the vacuum soothing so if I needed to do anything I'd vacuum first in the same room as them, then move onto vacuuming the kitchen and then leave it on while I quickly cleaned the kitchen and did laundry (they would wake the second I turned it off)
To be able to eat lunch I would have to let them have a sleep on their belly, sometimes raised with a pillow under their mattress (as the only way they'd stay calm and sleeping was lying on my chest on their front and this kept them in that same position)
- HV was okay with this as I would NEVER leave them unattended like this, and would still watch them like a hawk as I quickly shovelled food into my malnourished face before having to pick them up again.
As awful as it is, I think one of the best things you can do is accept the sound of crying.
Of course do all that you are physically and mentally capable of to not just let them cry but also remind yourself that you aren't superhuman, babies cry and as long as you know that they're fed, clean nappies and safe, please try not to stress.
Its lovely to have happy babies but at first I would always have one crying while I changed the other as they just wanted to be held all the time.
I just had to accept that it was inevitable and focused on my breathing while changing the first nappy rather than getting flustered and taking longer. - I do have panic disorder so this was the only way I could prevent myself having a meltdown, I wasn't just letting the babies cry but accepting that it would happen anyway saved me from panic attacks.
Try to remind yourself when they're crying and just wont stop that it's not something they're doing to you, for whatever reason (we dont always know why) they are upset and that the only thing theu know to do to tell their mama they need you, even just for comfort.
Try talking to your babies, saying it out loud can really help.
Things like "I dont know what's wrong and I dont know how I can help, but I do know I love you so I'm here for you."
"Oh dear, you're really unhappy, poor little baby."
Just try to keep your words and your breathing calm.
It is really bloody hard but you can do it.