Most aviation schools only allow you to earn one rating per semester, that's how both aviation universities I went to worked. There is a lot of beaurocratic crap you have to deal with as well. I'm just saying, you can go from zero hours to cfi in less than a year if you have the money lined up ahead of time.
And the 500 hours difference between atp and restricted atp is absolutely nothing, that's about 6 month instructing max.
Save money, get ratings done faster, I see no reason to get your ratings at a university. Coming from someone who went that route, I wish I didn't believe the junk the 141 schools feed you when you sign up. In both of my experiences, they were all lies and cost me a lot of money and ratings took way to long on their end, not mine.