@Wesam S.I agree that you need to repair the tub if it was not listed as non-functioning.I have listed non- functioning appliances in past leases.

Also, shoot for an 18 month (or 6 month) lease so that your next turn over is in the summer. 

If all your tenants leave after one year you have a bigger problem that just the leasing fees.

More importantly, there will be high turnover which leads to turnover costs, more repairs, more leasing fees and just way more headaches - especially when you're supposed to be passively investing from across the country.  

They have a lease with the previous owner but it’s already expired.

I've been researching lease options on the internet and there is a lot of information and coaching on the subject.

Do you also allocate a signing fee for new tenants with annual lease etc? 

The threshold for STR with FDOR (known by most as the sales and use tax enforcers) is 6 months so I keep a clause in my leases that if they move out before occupying the property for at least six months they're also on the hook for paying sales tax on their rent (6.5%  in Orange Co. but varies from 6% to 7% depending on local voters funding their favorite projects with the amount in excess of 6%). 

Our lease ended with tenant who is mexican and they moved out of the house.

Specifically can I ask for actual documents like a copy of the current lease, any receipts of past work (she mentioned a new A/C unit, etc), and receipts of rent.