Every dream requires sacrifice. Question is, can the dream live up to level of sacrifice? The answer is Yes.... as long as you make your dream a reality. This website has been awesome for me and 100's of others in researching, dreaming and finally, throwing caution to the wind and leaping.
You can do whatever you want to in life. The only inhibitor.....you.... There are alot of us who left in our thirty somethings and are "living the dream".... yeah that saying gets old.... as do we....

You can make it. And probably not have to sacrifice too much... with one major exception... the security of it all.
When I left my job, I was making close to 90's, benefits, 20 year retirement the works..... But I wasn't as happy and satisfied as I should be. No kids, no wife and very little commitments.... and off I went. The reality is that you will question your decision... no doubt about it. And at the beginning it is very unnerving (the lack of security, not the flying). But after you are instructing for a few months and you start getting good at it, you finally realize that this truly was a great decision.....
Consider instructing as a paid internship at first... Because that is about what the money equals. After a while though, you can do ok. Like many of us, if you have some retirement accounts to help you live through the lack of funds times, your quality of life should not change too much.
Then, just do what you love and then the money will follow. If not, at least you are doing what you love........
Good luck and let the games begin......