Hi Anudeep,
When looking to buy a short term rental, and you find one on the market that is already a short term rental, your agent can usually get the gross revenue numbers from the selling agent. They usually will send a printout from AIRBNB showing the income generate. They may use other booking platforms also, and can send those numbers usually also.
I have had clients buy homes that were already airbnbs and others that needed a lot of work, and their's definitely benefits to each strategy.
For property management it depends on the location. We've had clients buy in Big Bear, Joshua Tree, Palm Springs and other short term rental markets in SoCal, so reach out if you need a connection. My advice is to start managing it yourself, and if it's too much, you can then transition. You want to keep the airbnb account in your name, in case you don't like the management company.
For financing, you can go with the second home loan at 10% down, or investment loans at 15-20% down or DSCR loans. I can connect you with a lender if you'd like.
The tax benefits of STR when you self manage and have a W-2 job or other active income are a huge benefit, and I would consult a tax consultant on that.
Take Care and let's talk soon!