Group Of 3 Female Bettas Or One Male Betta?

I'm most likely going to have a 10 gallon aquarium set up around august (I'm going to South America and I'll spend my birthday there, I'll use the birthday money to buy the whole setup) and I know that I'll for sure want bettas, but I don't know which to get. Should I get one male or should I get 3 females? If I have enough I'll but black sand and make it as heavily planted as possible (can you also help me with how many plants and what type of plants I should put in the tank?)

Any suggestions on other fish are welcomed! Warning: I'm incredibly stubborn when I set my heart on an Idea

 

A sorority wouldn't work out in the tank, so one male will be good.

 

If you wanted to gwt a 20 gallon long or larger you could make a betta sorority with 7+ female bettas. In a 10 gallon I would only do 1 male (or 1 female). Unfortunately 3 f bettas in a 10 gallon would have too much aggression.

 

If you wanted to gwt a 20 gallon long or larger you could make a betta sorority with 7+ female bettas. In a 10 gallon I would only do 1 male (or 1 female). Unfortunately 3 f bettas in a 10 gallon would have too much aggression.

I would defo go for a 20 long but the one I already have I'm about to set up for breeding plecos for profit

I don't have space for another 20 long either so a 10 gallon will have to do

 

I'd vote a single male or female betta in the 10 gallon. For a sorority of bettas to work well you want enough hiding places and a big enough tank. The one I had was in a 29 gal, with seven ladies and it was a fun setup while it lasted.