they'd be happy in a 30+ with a few tankmates ... I've never had much luck with corys till recently when a guy PCSing (moving) gave me 3 with an angel fish and a dojo loach ... what a mix they make in with my africans ... but I give them a good home. Angel would prolly be happer @ a lower PH though
watch stores like petco or petsmart if you have one local, they regularly put tanks on clearance ( my favorite friend

) I got a 28 bow front tank with the top and stand for $57 on clearance @ petco ... but it helps to get to know the fish dept manager too

(was $99 but she took xtra 30% or so off cause the black paint wasn't "even" on the stand

)
Or look in the paper for a used tank you could probably "vulture" up someon's whole set up for cheap (less than a year or 2 old ... alot of beginners get frustrated with the put up tank throw fish in the same day ... die a week later .. next month trhow more fish in ... die a cuple weeks down the road because the LFS never bothered to tell them about the nitrogen cycle or proper way to add fish .. or anything but "yea they look cool don't they"
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A conglomeration of cichlids from all over living happily in my "melting pot" of tanks.
Breeding: currently nothing ... I'm sequestered in South Korea, "Osan" to be exact
2 days till I'm back in the states!!!! Florida to be exact, those Floridians have no idea what they're in for!!
current Fry: see above
tanks: 100, 55, 46 BF, 26 BF, 20L, 5 fry tank 20L planted with CRS is the only thing up (easy for the wife to care for in my stead)