Anyhow, I found this local storage tank fabricator, Gulf Coast Tank, that showed me tons of options of storage tanks that I could use with a varied range of storage capacity. They even showed me tank options they don't even carry! I'll show my vast internet knowledge by pasting their video below.
Galvanized steel water tanks are an ideal option, ultimately the type of tank we went with. The wife and I both like them for both their lifespan and beauty. Steel Water storage tanks are available in sizes that range from light tanks of 150 gallons to medium-sized 2,500-gallon tanks and are lightweight and easy to move if needed.
Most tanks are corrugated galvanized steel dipped in hot zinc to improve corrosion resistance. These tanks should be filled with a food-grade liner, normally polyethylene or PVC, or covered on the inside with epoxy paint. The color or liner will increase the longevity of the metal and, if being used for potable water, must be FDA and NSF certified for potability.
These tanks are for above-ground use. Old or recycled containers may contain lead and should be avoided. Brass and bronze fixtures should not be connected straight to the tank as they will create corrosion. Additionally, caution should be taken when washing these tanks, as a film typically develops on the center of the tank, which coats the tank and hinders corrosion.
Tell me about your experience with rainwater collection in the space below. Again, thanks for reading.