No, that is my point, we all got out of the JBO business years ago. The regulatory costs were killing us. You will be hard pressed to find a JBO. That ship sailed. I would look for a DeLorean.
Maybe a silly question, but what on hell is a JBO business? (I'm not from US) "Jobs Back Office" ? "Joint Broker Office"?
Still a couple of them out there. Sumo Capital being one of them. For almost all people its really not worth it joining one. I recently closed my account and am now all customer.
If you could find a Prop firm willing to give you significant margin (though it won't be me than $30k on a $5k investment to start with) why not trade straight equities? Swing trading options is a real nuisance.
I've written a software that is specialised on weeklys and finds realtime/neartime several hundreds of lucrative option trades per day. But as said, it is not daytrading. I think one should make use of most of these trades, but that requires much capital. So, a prop firm would be ideal for this.
If you're trading options vs options or options vs stocks, your capital requirement will be similar in a customer pm account and a prop/jbo account. Both are mainly concerned with movement risk. They will take the stock/index up or down a certain percentage. The prop account would be more helpful if you were trading index options vs futures as they would look at both. A pm account at TOS or IB would need about 100 to 125k of capital. I similar amount would be needed to open an account at a prop trading firm such as Sumo. The prop account will be more costly in terms of professional fees and licensing.