"After my PPL, I plan on taking aviation classes head on and leave my current job. I am thinking of taking accelerated course where one can finish to CFI-ME in 90 days. I am sure you guys already know what school that is. I even though about taking flight lessons on weekends and finish to CFI-ME in 5 years but that will be very difficult since my job is stressful and I work as a consultant on contract. What are your thoughts on PPL to CFI-ME in 90 days? Is it a good idea or would you suggest spanning this over 5 years of time? I have a feeling that I would forget some stuff in this long span of 5 years. One of the good things about that accelerated program is that, graduates are guaranteed instructor job upon completion of program. This will help me build time too. Thoughts, suggestions, advice?"

This is what I did and I would recommend against it. A lot of these schools are basically ratings mills. The education quality is minimal as well as their fiscal integrity. You could lose a lot of money literally overnight (plenty of horror stories online - believe them).
Be careful of these employment guarantees. You could end up getting a handful of hours per month being employed by a school you may not like very much. Get details.

I would suggest that you stick with your current job, train on the side locally, pay-as-you-go and start instructing there when the time comes. By that time, you'll know if this school is a place you'd like to work at and possibly scan the rest of the region for other school possibilities.

Good luck.