Its ok questions are good... they make me think about the how's and why's of my play.
Ok so your laying a out a scenario with an initial bankroll of $5k.
To be honest I wouldn't do anything different. After my first good, big month I got over-confident and played a lot looser then I had previously and
lost 7 deposit bonuses by busting out and ended up losing for the month

The month after that I went back to my tight style and had a great month, so in my experience I'm strongly in favor of the slow, patient approach.
If your whoring bj bonuses an large bankroll helps because you don't have to wait for casino to get the money back to you... sometimes can take longer then should

As for risk versus profit thats a tough one. Personally I have experienced runs of hands of 20+ losing and winning. If you hit a losing streak and your betting big you bust. Once you start betting big consistently whoring is pretty much out the window and your just gambling and hoping to get lucky.
Maybe try wager about 1/40 of your total balance? Maybe try some large bets with play money to test it out?
Intercasino has a regular free bj tournament every Monday and the format is usually $2k starting balance and max bet of $300 and I've usually
busted to $0 very quickly

I guess it also depends on what your goals are...
I'm not making a living out of this nor trying too. I only gamble where I get a bonus and the odd tournament here and there.