Separate sump/display fuge idea

Damon Lee of the Sea

Reefing newb
So im setting up a 150 mixed reef. I have a 30g sump I'm gonna hide in the stand but want to do a separate 30g display fuge with some cool macros and maybe a peacock mantis. Does anyone have any input or advice on how I should set this up? Should I go sump first then fuge or vice versa? Can this even work? Is it worth it or will it just be a pita? Any feedback is appreciated. Thanks