There are lenders that will allow you to utilize the STR (short term rental) income to qualify. They're far and few between, but it's do-able. Find a Broker who specializes in such loan-types, as most are going to be wholesale lenders and not accessible consumer/investor direct.
Your original post, however, seems to be asking how you can PURCHASE using AirBnB income -- this, I haven't seen yet, personally. Most that are lending based on rents received will go off of the rental comps on the appraisal report for a purchase. Those numbers will be based on market conditions and will only include long-term rental income. That doesn't always mean the property has to be occupied with a tenant in order to purchase, it just means they won't be calculating off of STR income.
If you can buy something vacant even in a strong rental market, you can refi it once you have a history of AirBnB income.