well ok.ill give you the info you were asking about on each of these choices
panther,big headed,or pictus geckos(this species has many different names)
downfall:they breed all the time so you will have to seperate the male from them after they have bred a few times but this means they also lay many eggs.
cost:about 30 dollars each
upside:you can fit 3 in a ten gallon and five in a 20 gallon
viper geckos
downfall:they will cost more than you asking
cost:50 dollars or over
upside:easy to breed and require basic care needs
house geckos(their are many different types including a giant one and you should fid out wich one you wnat first)
downfall:not much as they are all oretty hardy except some have small babies
cost:usually under 30 bucks
upside:hardy and most are dirt cheap
brown or green anoles
downfall:they can be rather costly to set up
cost:usually under twenty dollars
upside:breed easily adn babies are pretty easy to raise
crested geckos
downside:not much as they are considered a very good beginner gecko
cost:around 50 dollars
upside:very hardy and very easy to breed
gargoyle gekco
downside:not much but i think they need it alittle cooler than some geckos but im not quite sure.
cost:around 60 and up
upside:easy to breed adn easy to care for
gold dust day geckos
downside:not very much as they are very hardy lizards
cost:around 35 dollars
upside:very hardy and pretty easy to breed
these are some of my suggestions.i dont think you should freeze the eggs though.also one more thing.some reptile stores advertise on this site in the classifieds and some sell gravid female lizards.this is how i got my first babies as i got some from a reptile show and to my surprise the female gave birth to 6 babies later that month.hope this info helps you and once you dedcided on what you want tell me adn i can probably help you out.
nick