You can buy direct from IM - they seem to have the 25 lagoon in stock.https://www.marinedepot.com/innovative-marine-lagoon-25-pro-aio-25-gallon-aquarium-bundle, You mean something like this?
Also is there any RODI system that I could use that is not over 200 dollars?
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For RODI, this is the cheap and effective go-to:
Id go with a 100w - 150w heater. You should source your gear online. It will be WAY cheaper than what youll see it for at LFS's

