I'll try to guess where else he gets on (skipping states where it's already too late):
Alabama - 5k signatures by 8/18 - very unrealistic he'll collect that many in so little time - NO
Arizona - ~36k signatures from voters who are "not affiliated with a qualified political party" by 9/9 - not impossible, but sounds difficult - NO
Idaho - 1k signatures by 8/24 - No guarantee, but I guess it's easy enough - YES
Iowa - 1.5k signatures by 8/19 (signers must be collectively from at least ten different counties) - hmmm....is he going to make a serious effort here or not..tough call but I'll guess - NO
Kentucky - 5k signatures by 9/9 - yeah, this isn't too bad - YES
Lousiana - Monetary Fee per OP - YES
Minnesota - 2k signatures by 8/23 - tough but third parties generally overperform here - YES
Mississippi - 1k signatures by 9/9 - YES
Montana - 5k signatures by 8/17 - see AL - NO
New York - 15k signatures by 8/23 (at least 100 in each CD) - just not enough time for this sort of thing - NO
North Dakota - 4k signatures by 9/5 - tough but doable - YES
Oregon - ~17.9k signatures by 8/30 - LOL NO
Rhode Island - 1k signatures by 9/9 - YES
Tennessee - 275 signatures by 8/18 - as long as he gets there quickly it's a - YES
Utah - 1k signatures by 8/15 - well that deadline kind of stinks for him. Maybe Romney can pull a string or two, maybe McMullin is already busy collecting (he is headquarted here). I'll be bold and say... - YES
Virginia - 5k signatures by 8/30 (at least 200 in each CD) - tough but doable - YES
Wyoming - ~3.3k signatures by 8/30 - YES
https://ballotpedia.org/Filing_deadlines_and_signature_requirements_for_independent_presidential_candidates,_2016 Green - Already on or predicted to get on - 11 states, 85 electoral votes
Blue - Could technically get on but most likely won't - 6 states, 65 electoral votes
Gray - Already too late - 33 states + D.C., 388 electoral votes
Also, I will point out that the CPD requires you have enough ballot access to theoretically be able to win the election without faithless electors - so yeah, absolute 0% chance of McMullin being in the debates.