With the price of acrylic sky rocketing due to Covid, when I made my DIY sump, I got the local glass company to make the baffles; cheaper and easier to attach. I haven't priced acrylic lately so maybe the price has dropped back down.All takes time and patience. Check out the rockscape on my 120. Took my wife months to get it like she wanted.
One thing I wish I would have listened to others about is my sump for the cube tank. I got a 40 breeder and a kit. Thought it came out great, but now after 6 months a few of the seems are letting loose. Dont think I'll go that route again unless I use strictly glass for baffles.