Need Help...

[Rythm]

I just got a 70gal tank and have only one female gecko, I want to get another gecko but don't know if I should get a male or female.
I'd like some input about which I should get

If I get a male, I could partition the tank to keep the male seperated when he needs to be. But I don't know how long one male and one female should be kept together for breeding.

Or I could not make a partition and get a female.

Here are pictures of the tank, I'm trying to get some hides built to occupy some of the space so please ignore the bareness of the tank.

 

[Phoenix]

Personally, I would get as many nice females as I could and one really nice male. 75 g is huge! What I plan on doing once my females are grown up is keep the girls in the big tank and the male in a smaller tank and put him in with them during breeding season.

 

[Rythm]

Personally, I would get as many nice females as I could and one really nice male. 75 g is huge! What I plan on doing once my females are grown up is keep the girls in the big tank and the male in a smaller tank and put him in with them during breeding season.

I'd love to get a bunch of geckos and even though i have the room, I can't afford to get them right now. I could get one more either soonish or in september at the reptile expo. I would like to get a male so that I can sell the babies and possibly use that money to get more females.
But how long should a male stay in with one female? (on average).