Thanks brother, As far as hiring a boat is concerned. Its same as Rent a car. Veriety and range of boats depends on from where aned what you are hiring. It ranges from 6000- to 60,000- depends on your plan,route, time, pocket and no.of persons. (jitna gurr dalo ***....).
I am providing you the points form where a boat can be hired ;
1- Keamari harbour :- If you want to go in open sea or area near Manora, there are a number of commercial and passenger boats available there. You can also have a package plan with them. They arrange a full day excursion including cooking meal and fresh fried fish on boat. Better to take this if you are new. They also take per person packages on sundays, which is quiet reasonable. But remember, bargaining is very important.
2- Ibrahim Hydery, Rehri goth, Ali goth, Umer jutt dhakka (harbour) :- All are on the same track. They are mostly fishing boats. They also arrange package tours for day depending on your pocket and no. of persons. But bargaining is must.
3- From all these sites, they also arrange per person package. They pick you from harbour and drop at some island and pick you in the evening or if you are there for the night, pick you in morning. Quiet cheap package, But exclusively for hard core fishing addicts. Not recommended for every one.
4- On the other hand if you have some exclusive links with Marina Club members, Navy or Maritime agency or KPT officers. Then you are a king. Number of luxurious boats are at your disposal. 
