Another high school teacher to chime in and provide another perspective:
Financial considerations aside, I think there are two key factors to keep in mind when making this decision.
First consideration, do you REALLY want to be a teacher? I'm not implying that you have to be a saint or anything like that, but teaching is definitely more of a calling compared to others jobs that are out there. As others have mentioned, it can be a very demanding/draining job because there are so many demands throughout the course of the day such as lesson planning, meetings, dealing with students, dealing with staff, extra curricular activities (coaching, clubs, etc), etc.. Even though students are in session from 8am-3pm at my school, I typically put in about 10-11 hours everyday plus 6-8 hours on the weekends playing catch-up. The time demands are much higher than the "hours" would suggest.
This is why I think it's crucial that you REALLY want to go into teaching for the right reasons (helping students) instead of the ancillary benefits (summers off, benefits, tenure).
Second, the site that you teach at is very important as well. The composition of students, staff, and resources can vary dramatically from district to district. For example, at my school site most of my students are English Language learners, low-income, more behavioral issues, etc. compared to the district right next door in which every student has an iPad, 80% plus are college bound, proficient in English, little behavioral problems, etc.. Don't get me wrong, I love the school I'm teaching at and the demographic that I work with, but it's definitely a personal preference that you have to figure out. I've talked to some teachers who would never teach in the district that I'm in, but they are perfectly happy at their site because of good students, administration, resources, etc.. So, if you decide that teaching is for you I would highly recommend you research the districts in your area to find a school that would be a good fit.
Now that the disclaimers are out of the way I wanted to highlight some of the positive aspects and "here's what I would do if starting over again."
As mentioned above, if teaching is the right fit for you then you will love this job. You get paid to help others learn and are able to continually learn in this profession. Aside from the occasional performance review, I don't have a boss breathing down my neck and generally have a great deal of autonomy in how I want to teach and run my classroom. In addition, I find being around young people to be invigorating and allows me to be a little sillier than I would get to be in other professions.
Finally, my advice to people that are new going into the profession would be to get proficient at classroom management and lesson planning ASAP. Nothing will sap your enthusiasm for teaching quicker than having lots of behavioral issues and having to do lesson plans late into the night. I'm not going to lie, the first year or two of teaching is tough as you are figuring out how to manage a classroom and lesson plan when you are exhausted after having put in a full day and want to spend time with your family. Also, find a good mentor teacher that can show you the ropes and that way you have someone to swap stories with at the end of the day. Teaching can be an isolating profession as you spend so much time with teenagers all day, so it's good to have a colleague that you can debrief with daily.