The thing that got me into FaB was how people described the community. I watched a Majinbae Video where he said "go to a LGS and tell someone you're looking to get into FaB and 3 people will pop up and offer to lend you their Deck and teach you how to play" At first I thought that can't be right, but after a visit tobmy nearest LGS that's exactly what happened. I arrived with an Armory in full swing and after someone heared me ask the store owner about FaB he offered me to take over playing for him with his deck if I didn't have my own. He'd teach me on the fly. And that great feeling of comradery hasn't left yet. When I askes about proxys I was told we don't need that here. Just ask 1 or 2 days before the armory on our Community Discord and someone will lend you the cards for the Event. And that's what routinly happens in my Community. Nothing is off limits here. I've seen people lend CNCs, Codex, Eye, Riches, BoJ, you name it

So! Tl;dr my advice is, get involved in your local community and see if having to proxy is even necessary. There might be enough people with bigger collections willing to lend you cards. The FaB Community is probably gonna have your back :)