Hey scotty----great concerns/questions. Not many can understand your position nor financial concerns. I may be able to lend you my opinion. I ran a business for several years----I sold and went back to school then to dental school. I'm 32 and graduate in 3weeks.
Here is some of the things you must consider before making the decision.
---Do you have a family? Do they support your decision? If you do this will be a HUGE change in their/your life. No income or extremely reduced income is scary. You will need the most incredibly supportive people around you to make this work, because you will essentially be married to school and your family.
---You say you are looking to go to dental school, do you have your pre-reqs for dschool complete and the DAT taken already. If not that may add another year or two. The interview process takes place nearly a year prior to entering school. If you have everything ready to go you'll be applying for and entering 2006. That's if all things are in order; actually you should have started your application process (ideally) now for 2006. Are you a competetive applicant?
---Desire. It definitely has to be what you want to do. There are easier ways to make more money and have a fruitful life. LOTS of easier ways lol. There is a risk a as we get older due to the debt, but that can be overcome by pure desire to be a dentist. You can't be half-hearted about dentistry and make it through dschool---teeth are just not that interesting if desire is lacking.
----OK, lets say you're ready to go. BY ALL MEANS GO. Think about it like a business. What do most business cost to open? Couple 100k, conservatively 400k. I mean conservatively. Now most, nearly 90% + of new businesses fail in their first 5 years. The risk is incredible but so are the rewards. Now take dentistry. It's an investment in you. Can you think of a better person to invest in
🙂 . You are being taught a skill/education that very few people possess, it can never be taken away from you. You now have specialized knowledge---which btw is one of the most important characteristic of successful people. You invest say 400k. (bought a small practice or invested in a partnership. You have 20 strong earning years as a 36yo grad. Another 10 as above average earning years to retirement. Let's say you have 400k debt and 15 solid years out of 30 with an avg income of $175K. (Which is what the ADA has stated for avp GP in practice) Heck let's subtract 20k to be safe and go with $150k year for 15 years out of 30. You're a business owner with all the tax perks, breaks, and write offs. As an owner you have LEVERAGE in your life which can be rolled into buying power etc.... Talking straight numbers (you can add your own inflation for the analytics) your potential is suffice for a comfortable lifestyle. This is at minimums essentially and as an owner you should be able to produce better than what I've stated. I've given you a 15 year buffer
😀.
Remember you'll rarely if ever meet the debt free person. People owe on houses, cars, businesses etc.... In fact debt isn't bad as long as it is GOOD debt. Good Debt makes money for you or continues to build you equity. Bad debt drains you and does nothing for your future or in fact loses value quickly. Good debt ie specialized knowlege, real estate, etc... Bad debt flat screen tv, $500 ostrich shoes, $1000 suits etc.... If you get with a good financial planner and cpa and live with in your means----YOU WILL BE comfortable----on top of the fact you run your own life with no glass ceilings, you are a respect individual in society, and you make a great living.
Your age is not a reason to not pursue dentistry. You'll be fine financially if you have the correct people around you and you have a small amount of sense. A banker recently told our class "Dentists are the nations 3rd most successful business and even in-spite of some of you it's almost impossible not to be successful."

I say go for it but please be ready to work harder than you ever have as being out of school for awhile can be a bear to come back to
😱 . Take this from someone who worked 100hr wks running a business in 3 states for over 4 years. It's a different kind of stress and exhaustion.
Gotta run----hope this gives a little insight----post or pm me with any questions