Make sure you carefully budget everything out. I'm planning my own setup right now and it is not cheap. Sumps are recommended and can be somewhat expensive on their own. I budgeted about 150-250 just for the sump, glass baffles, overflow box, pump, pvc, silicone, etc. Other things you may need: live rock, aragonite sand, a stand, lights, refractometer, powerheads, test kits, salt. Also I'm not sure if it is necessary for a FOWLR tank but you may also need an RO/DI unit.