Ok. I think that's enough for me to go on.
There are two main philosophies of what people call a 'prop firm'. They can be distinguished by how much you and the firm are aligned from a profit making standpoint.
One group always requests first loss capital. Usually payment for desk fees / software and maybe some training. Then they give you a comissoon schedule and offer you a high payout of 80-99%. In reality they are fairly indifferent to your success - and they are certainly not betting on it.
The other model is to pay a salary, rarely require first loss capital, and pay all your trading expenses until you've got something working. They also pass on to you all the rebates they get. It used to be that they would offer a 50% payout but that's not really sustainable anymore and 20-25% is the current norm. They are very invested in your success and have bet heavily on it.
In one of these models everyone stays poor and in the other model you might get a 90%+ chance of the trader succeeding and everyone making good money.
Just think about it. There's no way to maintain a competitive infrastructure when the trader is getting 90% of the profit. They aren't even trying. The whole model is to churn through people en masse and collect commission and desk fees off them. Even then, it really doesn't work out for anyone.
Ask them revenue per person and revenue per trader. Ideally ask a few people separately. Good numbers would be $1-2M. If the numbers they say are 1-2x your day job salary then 1) they are lying and the number is actually lower 2) even if that were the average it wouldn't be worth the time/risk.
People way underestimate the reward required to sink very precious time into producing a volatile income stream. For adequate retirement happiness and to compensate for the risk you are taking you should have 80% confidence you would be bringing in 300k+/yr after 18 months.
I know several traders who have had million dollar years, never lost money, didn't overspend and currently are having trouble making ends meet. It's a path with lots of uncertainty.