1) Get tanker/hazmat endorsements (and really any others you can while in school). Get a TWIC. Get on with a tanker starter company. Look at Schneider's bulk division; I searched for Ft. Lauderdale, and they hire out of FLA.
2) Pros: pay and good job prospects, esp. after a year or 2 of experience. Cons: dangerous (but all truck driving is really).
3) At first it might be a challenge, but after said 1 year of experience, you should be able to w/out much trouble.
4) It's one of the highest paying types of hauling; easily 50k plus your first year.