Rescue more bonus reliant, Sentinel isn't hated by the mods.

Also Sentinel can be half-decked.

Fang Pi expensive these days. Also lacks quite a bit of manipulation, so you have to outplay more often than not with them.

Rescue - easy to use but not really top tier w/ Lea & Elvira banned

Sentinel - From what i know, great clan and lots of strong cards

FPC - fine but not really that amazing from what i have read/seen

Rescue: Bloody easy to use. Their more useful cards tend to be quite expensive tho', and you'll need to play them in Mono, meaning you need 8 good cards of them.
You may have better luck just going with Montana.
Sentinel: Not really great or bad at anything, imo. With Lehane gone you won't have (m)any Elo banning issues either. Also quite cheap, not counting Melvin and Coby.
FPC: Always safe from ELO bans. High power and good damage, making them very straight forward and fairly easy to use. Unfortunately higher powered cards tend to be pretty expensive with the exception of Futoshi Ld. Having said that, with Ralph, Unagi, Sayura and Yu Mei you have a ridiculously cheap half-deck that can still pack a punch, especially for a beginner.

Rescue are fine There a good clan to use . I play Montana + Rescue . There both good but when Avola gets a ban , they become less effective because Don isn't the greatest card.

For Rescue this is the best and most common deck .

Krash (Super cheap! Yet it's a great card) Steve Buckler Anita Daussone (Super cheap again) Slyde (700 Clintz , a bit cheap)
Kerry + Sledg

A budget deck , if I was to name one would be -

Krash Larry Daussone Wesley Slyde Joanna Gordon Cliff (That decks about 7k I think)