Reddit mentions of Petmate Two Door Top Load 19-Inch Pet Kennel, Metallic Pearl White and Coffee Ground Bottom

Your list looks pretty good so far!

EcoBedding has a couple of advantages over other beddings. It's very low dust and it won't really get kicked out of the cage. Its drawbacks are that it doesn't provide a good floor covering because it just kinda sits on top of the floor (I had to use sheets of paper under it) and it's not very absorbent so it doesn't do much to control odors. Its also very expensive for just being crinkle kraft paper. You can purchase gigantic boxes of crinkle-cut kraft paper from Staples for $20 (they don't keep it in stock, you have to pre-order it). I tried this as a primary bedding once but did not like it very much. I've been much happier with aspen shavings. They can be messier and would require a deep pan but they're better for controlling odors/ammonia.

I prefer water bottles to water bowls because bowls can get dirty with loose bedding, food bits, and even poop. Bottles are a sure-fire way to provide a constant supply of clean water. It can be a good idea to have two water bottles so if one malfunctions or stops releasing water, there's still a backup.

You can use a food bowl if you want but it's not necessary. You can also just scatter their food around the cage so they'll have to forage for it. Scatter feeding works best when mixed into a loose substrate like shavings or paper based beddings.

Hammocks are really easy to make yourself from old clothes or really any scraps of fabric. You'll want multiples because they need to be washed very often. When I used a Critter Nation, I used several hammocks and I had a few sets so I could quickly swap them out. I swap hammocks out every few days because they get stinky quickly. They can also get destroyed quickly so spending money on fancy store-bought hammocks might not be the best idea.

Some other items to consider;

Small Animal Carrier: I use a small hard-sided cat carrier for my boys. It's great for vet visits or general travel. The one I use has a door on the top and it makes it a lot easier to get timid rats out. Fabric/mesh carriers should be avoided because they may be chewed through.

Travel Cage: If you ever need to bring your rats with you on a trip or if you need someone to look after them for you, you may want a more portable cage for them. Something lightweight and/or collapsible is handy. You can sometimes find good deals on used cages on apps/sites like craigslist, marketplace, kijiji, etc. A bin cage would also work for this purpose and it can double as storage when not in use.

Various Cage Accessories: The cage is really the main expense to get started. After that, cage accessories can be dirt-cheap or free. For the most part, there's no reason to buy stuff besides bedding/litter from a pet store. The recycle bin, your basement/garage, thrift stores, and dollar stores are great sources for cage accessories. There are a few official pet items that I like, though. Space pods, lava ledges, and bendy rope perches are fantastic cage items.

Litter Box / Litter: Rats can be trained to poop in a litter box to some degree (they'll still pee all over). If you can train your rats somewhat, you can change the litter box every couple days and you wont need to clean the whole cage as much. A litter box should be big enough for your rats to fully step into. I use inexpensive corner ferret/rabbit litter trays with fragrance-free paper pellet cat litter.

You'll also want to consider how you're going to cover the shelf in the cage. The shallow pan doesn't hold bedding but it still should be covered with something. I made "mats" out of fleece with an inner layer of an absorbent material and it worked well on the cage shelves.