I'm about to rent out my first property and would love a recommendation on an app to use to screen applicants, submit maintenance requests, and receive rent. 

I have two applications from the same household.

Oakland in general has large demand for LTR, especially in the family-friendly neighborhoods, so I wouldn't be surprised if you are already seeing many applicants on day 1.

She offered to pay a full rent's payment upfront, along with the deposit, to compensate for her current unemployment.Are there negatives or major red flags that are associated with this that I should consider as I evaluate her application?

Loans are underwritten by Fannie Mae’s Desktop Underwriter (DU) or Freddie Mac’s Loan Product Advisor (LPA) which based on the loan application will decide on reserves needed. 

Hi, I have an applicant who is 20 years old with a low credit score.

I find that when I allow pets, I get more and higher quality applicants who earn more, have better credit, and have fewer background problems.

That local government is who submits as "sponsor" for proposed applications.

If they pass they can view and submit an application.

I always make it a point to be upfront with my clients about potential fees from some of the lenders I work with, like application fees, appraisal costs, and others.