Not impossible, but a lot of work. I’d narrow down the list if possible.
I’m saying this as someone who just finished helping her surrogate daughter do 21 schools! It was a huge undertaking. I wouldn’t recommend it, even using the common app.
Also, don’t think you’re getting away with writing only one essay by doing the common app. Most of the schools my daughter applied to required additional essays on top of the one submitted for the common app. Most of her schools required two or three essays each. We definitely ended up rushing some, and those weren’t the best which is not what you want to do. We were basically only able to reuse the Tell Me Something Unique About You prompt that many schools had as an optional extra essay.
There are also extra sections you have to fill out for each school on the common app., so it really felt like we were still doing individual applications for each school. I’m sure it did save some time, but it was still a very long process. We started in September and just barely made the Nov. 1 deadline we were shooting for, and that was with her spending all her free time working on applications and skipping a few extra curriculars as well to get it all done.
On top of the huge amount of time needed, it’s expensive to apply to so many schools. Even if they waive the application fee, you’ve got to pay to send your ACT/SAT scores to the schools ($13/school) and then make sure all your transcripts and recommendation letters are sent out as well. Also, it can be difficult to get some schools to send out everything you need. Definitely check with your school as some have a limit on how many schools they’ll send your transcripts to and such.
Then there are admission counselors to check in with, logins and portals to keep tack of, not to mention visits and scholarships. If you do try to do this, you’ll need to be very organized and stay on top of everything. We’ve only managed because we are really only paying close attention to about 6 schools. The others are state safeties that are fairly low maintenance or Tuition Exchange schools we aren’t concerned with right now as her export school has her wait-listed. If it wasn’t for TE, we’d only have applied to 10 total.
If you do try to apply to all 24, I’d make a priority list. That way if you burn out before the end or don’t do as well on those last essays, it won’t matter as much. Also, make some type of chart to track everything to help you keep up with who has what and what is still missing. Remember an application isn’t considered complete until everything is received (app, fee, transcripts, scores, letters, etc).

