@Alex7645 This guest obviously hasn't bothered to read anything about how Airbnb works. I would tell him that hosts have nothing to do with the Airbnb payment schedules, and that he should spend some time reading all the articles for guests in the Help section on the Airbnb site.
No way should you accept a 4 month booking from an Airbnb newbie with no reviews. "Verified "means nothing. It means he submitted a photo ID. So what?
Do you realize that if a guest stays for 30 days, they will fall under landlord/tenant laws and you'll have a really hard time evicting them if they are objectionable or don't come up with the payment after the first month?
There are no protections from Airbnb for long term bookings. No security deposit taken, no criminal record check, no guarantee of payment beyond the first month.