Yeah, it sounds like a good learning experience for you. Be glad you didn't take out the 10K loan, lose it, take out a 20K loan to win back the money from the 10K loan + 10K for you, etc. as I am sure that has caused some gamblers to get into massive debt.
If I were to try and do this professionally, off the top of my head:
$40K bankroll 1% bet size MLB, NHL, UFC With spot bets on spread sports
$48-50K life roll
No debt other than a mortgage
I think this would set someone up to succeed. You could have a losing year and still be ok on your life roll. It's good sometimes to sit down and crank out your budget and dive into your sports betting #'s as well. Sometimes it makes you face harsh truths, but you are better off for it in the long run. It will also make you look at sports betting as a business, as your profession. Keep it simple, bet good #'s, try to get good spots, hedge accordingly, gamble as little as you can. You have to protect your neck when it's your job.
Now, for most people, it's easier to write this out and keep it in mind as a guide line. The problem occurs when you've lost 5 bets in a row and you chase. There can be no chasing. It's ok to go to bed a loser on the day. You have to think big picture. Do you feel like shit when your 401K goes down because the Dow dropped 1% on the day? No, because you know that long term, you will make a percentage profit on your index fund. You have to treat sports betting the same way. Dispassionate, like a business. It will probably ruin watching sports for you as a fan.
It's fun to lament the shitty beats and sit around with a beer and vent on why this happened or that happened. That's part of what makes SBR so great. But, when I'm in Vegas and some guy in his giveaway promotional t-shirt walks up to me and starts bitching about why such and such team fouled down 10 and it ruined his 6 team parlay, I just have to laugh. Let Vegas make money off those guys. You need to be the guy grinding 2.5 units a week to pay the mortgage and go out for a nice dinner.
If I were you, I'd get the 9-5 job, knock out all your debt (credit card, car note, student loans, etc.) bank money and recreational sports bet from time to time. You can work your way on building your bank roll and your life roll and bet professionally again. Or you may find that a little betting and having the security of a paycheck every two weeks is more enjoyable than the stress of having to win to keep the lights on. BOL on whatever you decide