What type of systematic you gearing toward? I ran a 50 gal SPS dominated one before and found it to be a pain keeping the parameters steady. The low water volume might drive you crazy. Water changes are a breeze, but swings can be dangerous. I eventually lost it to...wait for it....
KALK overdose after a power outtage..lol
BUT, there are alot that have had success with smaller systems.
There's a gang of them on here:
@dangalang has a nicer tank next to his washer and dryer than my DT
@DaddyHook keeps multiple small tanks looking good in his pirates quarters
@Darkxerox has had a successful truvu for years
@RandyC just set up a smaller system, although i think it may be plugged inline with his main one.
@SupraSaltyReefer honestly, I don't know if he still has smaller tanks, but he got so many, I wouldn't be surprised if he had a bad @ss one as well.
Those would be the systems I'd try to emulate if I went smaller. Their journals would have way better info than you can find on IG.