The 30 day thing is wrong for the evisa! I usually get mine earlier because I like to be prepared, for small kids and am a worrier/planner!
Apply now for the visa if you’re worried and want to check it out first. It’s literally only $40, so if you make a mistake you’ll only lost $40! Book the flights after to give yourself peace of mind.
Honestly it would be so hard to make a mistake on that form. It’s a very, very simple form. Just literally fill out your personal details. If you manage to make a mistake and don’t notice then worst case scenario is you get an email tomorrow to tell you, and just fill out the form more carefully tomorrow. You’ll lose $40.
When I wasn’t sure whether they’d accept photos I took on my own phone, I just submitted and paid for my own visa application first, didn’t do the kids just in case, so I didn’t lose too much money if it was wrong. Next day, when I got confirmation that it was fine, I submitted the kids. You could just do this to reassure yourself that the 30 day thing is wrong?
Unless you’re from Pakistan, or have visited there this year, you won’t have a problem. We have had many friends and family do this form to come and stay with us in our house out there and nobody has ever had a problem.