Good luck! A lot of people here dont take protein powders because it usually contains sugar. I bought protein powder and haven’t even opened it. So you’re not missing out by not buying expensive powders.
I dont take any supplemental vitamins and minerals but if you’re really scared of that just buy some and take it with food.
I don’t eat huge quantities of fruits myself coz they spike my sugar levels (I’m borderline diabetic) so you’re not really missing out. I also don’t drink protein shakes coz you’re right, they’re expensive. It’s actually more expensive to take supplements than just eating whole foods.
Don’t give up on yourself. Maybe it’s more sustainable for you to do 16:8 than OMAD.
I find for myself that it’s more expensive to eat processed foods. I also cut down on eating fastfood and/or eating out. It’s cheaper to recreate foods at home, and most of the time you’ll have leftovers for your next meal, so you’ll actually save more. Rice is also my staple and I still lost weight. I just stir fry some veggies, or replace rice with tofu, or replace meat with dried shiitake mushrooms if I’m on a budget. There are a lot of healthy, affordable substitutes that are underrated. Food doesn’t need to be complicated or expensive to be “healthy”.
It does take patience and a bit more dedication and mindfulness. Don’t lose hope. With just a bit of research and dedication, I know you’ll find a way to start on IF again and stick with it, and feel much better too. Also, take it slow.