lol, BiOrb. It makes me laugh.
Personally, I think they look very silly.
Let's see... you want a price quote, eh?
All right, let's break this down into parts:
Plain 2.5 gal tank = $11.00
Tetra Whisper filter= $5.00
Filter cartridges= $2.50
Betta food pellets= $3.00
Betta fish= $4-7.00
Lighting/hood= $6.00 (or you can make your own lid for cheaper)
Blood worms= $3.00
Betta fish medicine (depending on what you'd need in advance)= $3-5.00
Water conditioner (a big bottle of it) = $7.00
Decorations (depending on what kind)= $2-10 on up
Having a best friend that'll listen to you, no matter what: Priceless.
Initial set-up can be costly, but once you've made all of your purchases, upkeep isn't costly at all.... at least until you find yourself getting another Betta.
As was the case with me.
Also, welcome to the Forum!