Hw big of a tank would you recommend for this combination of fish?

How big of a tank would I need to have to have this bunch of fish?

A pair of Labidochromis caeruleus Labidochromis_caeruleus "yellow"
(wonderful yellow color),
Malawi One male and two females of Sciaenochromis ahli
Sciaenochromis_ahli (blue),
Malawi One male and two females of an (not too big growing)
Haplochromis or Aulonocara species, like Aulonocara eureka (Malawi) or
a Victorian Haplochromis species.
Only one Haplochromis or Aulonocara species - not two Haplochromis,
not two Aulonocara, not one Haplochromis and one Aulonocara - big
danger of crossbreeding! One pair of a Neolamprologus species, like
Neolamprologus brichardi Neolamprologus_brichardi

What would you think about this combination and what kinda of set up?
Any of help would be much appreciated as usual. Thanks