Howdy!
The fast and cheap way is drop $33,000 and 90 days at AllATPS and become one of their instructors. You'll have to wow them during your training, but if you survived an MIS, that is possible. It can be their fast program, or their weekend program ~ 10 months.
Another way is to drop around $64,000 at Flight Safety or Comair. Again these are imersion courses.
Doing it the slow way, well, I've spent over $100,000 and don't have my multiengine ratings yet. I am a CFI, CFII, commercial pilot, instrument rated, ground instructor, and airframe mechanic. I've been in aviation for 7 years. I've been trying to work in aviation for six of those years.
I made four mistakes: 1. Worked for an airline as a ramp agent. Bad move (six years of fighting a disability, the financial aspect was really bad). 2. Tolerated a flight school that was marginal at best. Really Bad move. 3. Put up with a flight instructor that didn't fit my style of learning and was too afraid to tell me I should take a break from flying. $4,000 flush. 4. Didn't go to ATPs when I had the full funds to pay cash, I knew they were a decent school, and I was after the instructor ratings.
However, I still landed at running an excellent flight school which was my final goal in aviation.
Fly SAFE!
Jedi Nein