It depends on your playstyle and also if you want to play a commonly played deck, or something unique. Knowing that would at least let you get an idea of what clans you'd want to use.
If you honestly have no idea where to start I would recommend taking a atk manip clan and combine it with a stun clan (SoA or SoB).
Atk manip will yield advantage or be neutral against other clans in ELO.
SoA or SoB will cause problem for other clans in ELO that relies on their ability or bonus.
It doesn't matter what clans as all clans have good cards in their own right but it's up to you to experiment and build a deck you feel is good for the format.
I recommend mono montanna. SImple to use and easy to know
Ivy makes a good bluff at round 1 or nice to have against Jungo or Pussycats you can replace her with Angelo if you dont like her
Furied Avola can 2 shot with any of the cards aside from the DR.
You can swap out ED CR for Desmond or Mona for Giofranco to meet your budget i guess
Weak against Soa i know