For new reefer, don't rush in to setup everything at the beginning after watching youtube. E.g reactor, dosing pump, refugium etc. Alot of things may not even be required during reefing journey. Start simple with the basic equipments and add along the way when needed. E.g. If your tank is small or low bioload, regular water change can already top up elements, nutrient export. This can save the money for dosing pump, reactor etc. Setup up more equipments also mean more room for failure and you will need to standby redundancy. Especially when u go holiday. Understand your problem then find the suitable solution to it. Lastly, DIY will help u save alot too just need to read up more. Just my 2 cents.