I've found a single-family home and plan to rent it to master's students to generate income.

I got some cash in hand which i can either put in a high yield savings account or use to pay my current mortgage and then cash out when i buy the next home. 

Depends on your credit score and debt to income ratio etc .If it us full doc and it is a primary residence sounds a little high . if it is an investment sounds pretty solid .

One LLC per property means more filings, signature blocks, bank accounts, paperwork, etc.  

Establish specific objectives for wealth building, financial independence, or passive income.

I would like to offset other Schedule C income for 2023 with the STR bonus depreciation from the cost seg., but it is not looking too promising. 

I have hosted 1500 check-ins on my Airbnb account in the last 3 years, and have learned a lot.

The reason is since I am the owner of the LLC, it's income is reported in my personal taxes. 

When I self-managed C Class properties, I would put the requirements for tenancy in the rental listing (3x rent in income, 1-month security deposit, criminal check, etc.), and then when the potential tenants called in, I would speak to them for a few minutes, explain the requirements, get some sort of verbal confirmation on some or all of the requirements, and then invite them to different showing times I had set up.

If you have a custodial account they should do it.