As far as book goes..... Ten percent is not really a good figure. Just based on juice your making .091919~. Thats only on losses tho. So assuming all action is even (it will never be). And W-L are an even 50:50... Thats only .04561 or something of all wagers that is profit from juice. Which isnt enough. Even if your small time with no runners, say 20 guys with nickel limits. At MOST, ppl maxing there limits EVERY week, your weekly handle is 10k. Say its completely even money on both sides, the usual -110 odds and juice. Thats $450 a week. 20 customers, on a per head site your paying 10 a head per week, thats -200 out of your bankroll. Basically it isnt pheasable. You lay off when you are really REALLY overexposed. Ten team parlays, big teasers, say in ny a giants/patriots superbowl.... Although you can adjust your lines the easiest on the sb bc there is so much time to do it.. You lay if your over exposed more than your bankroll.