Can anyone answer my questions on sleeve tattoos?

I believe the going rate is $100 per hour to start. Much will depend on the experience of the artist and how much time they spend on their work. Consider setting up 3 or more consultations with experienced artists in your area. Pay for their time and expertise to help you with design concepts and estimates of costs. Go with the best artist you can afford. You may want to start slowly and put work were it can easily be covered with clothing so as not to affect your future employment. All the things you are passionate about now will probably change in another 5-10 years but your tattoos will remain. Good luck, hope this was helpful.