Well since you have a business, I can't see why you couldn't do it. Obviiously you are looking to do it without having to continually reload. So you want to keep that 50K as your only investment.
I can tell you this...55% over 75 plays isn't going to cut it, no matter hwhat holds you are playing. Your record will be 41-34 every 75 plays. Betting a nickle a game as you mentioned, that isn't much money. After 6 months at 75 plays a month 55% is going to be 248-202. Risking 500 to win 481 (average of -104, which won't hold for the full six months) Will mean after six months you will have made a profit of 18,230 bux. That is IF you can hit 55% which I find unlikely but not impossible I suppose. So if you can do it for a year you will basically bemaking $36,500.
Now if you are reinvesting everything you make and taking your living expenses out of your "real" job then you can do it, to some extent, but it will still take a year to reach a level to up your bet amounts. But if you are taking 3K a month out of your gambling bank you will be too static to up your wager amounts. So your bankroll will only be about $50,230 after 6 months, or you are basically making enugh to pay your bills that you have planned. Obviously there are unforeseen dangers and problems that arise, and when one of them hits you will be looking at taking money from your slush fund (the 80K ) or your bank itself.
It isn't as easy as say IF I can do that or IF I can do this. You have to look at the worst case scenario. I did this myself. My start up was a little more than yours, but I can tell you it was a lot different back then than it is now. A lot easier back then to make money risk free. If you are not looking to scalp or arbitage in some way and simpley try to pick winners, I would say stop now.
Only you know ho wwell you really do. Not just the ones you remember. We all have those bets welike to forget about, well if you start doing this to pay the blls those bets either have to stop, or you will definately be remembering them.
Bottomline it is all about volume. You need to put as much money through the windows as you can. Then hope you make 7-8% on it to be VERY successful, or look to make 3-5% and be comfortable. With a 50K bankroll you should be pumping 1-1.5 million in bets through the windows a year. That will net you 30-75K. After you take out your bills you will gross 12-57K, you either reinvest or take some and reinvest some until you get to a maxed out bankroll, one where you can be betting enough to make enough to where you think you should be.
There won't be any compounding in that first year, as you will more thanliely be struggling somewhat. But you HAVE to have scalps/buy backs/ risk free/risk minimizing plays in there. Now is not a good time to start to be honest.
Best time to start is in March, baseball will be starting and the hoops numbers will be softer, and you will have all that free money in bases while books adjust to the way people are looking at certain teams. Build you bank roll a cuple mnths then hit the series bets in the NBA. Those things are a gold mine, and they are easy to get scalps and buy backs on, as ong as you get that first game right. But even if you're "wrong" you can always get out even, unless there is a sweep. Not to mention you have the NCAA tourney, where th elines move ike crazy and will open up some shots at scalps on MLs or middle shots if that is your thing, not really mine, but you can hit a couple which might make you some extra cash.
Just don't expect to go in and make amint hitting 55%, and really don't go in thinking you will hit 55% either. Go in with a realistic plan, and see what happens. After 19 years you shuld know, but a big difference sending money out here and there and keeping that money out there and nt lsing it all. When most people start seeing 4 figure balances they go nuts, when you have some decent 5 figure one around, it is very easy to go crazy.
Actually scratch what I just wrote, altogether. Send a place $1000 and within 6 months or so you should be a millionaire. As long as you follow the Kelly Criterion. You might have to pay someone to teach you I guess but following Kelly you CAN'T lose.:hung