Well, after all that, there's some simple solutions for those of us with less than $25,000 in accounts.
1. Cash Account for Options
The PDT rules apply only to margin accounts, not cash accounts.
You can open a cash stock&options account, and trade up to your cash limit, without arbitrary restrictions on the number of trades.
2. The PDT rule is applied per account, not per person.
You could open several accounts if you want to daytrade stocks. Each account would allow three daytrades per five days. I believe this would be simpler than trying to form a partnership or joining a prop firm just on account of the PDT rules.
That's about all there is to it.