They asked me to email them an application, which I did.

If they don't pass your screening you pass and move on to the next applicant (Sec 8 or not).Initial inspection is just like any inspection.

You can usually even just sign up immediately by filling out a form, without any real application process. 

It might not be the best best rate but the application process has been fairly simple and while I have my primary loan officer it is not uncommon for me to send correspondence to his boss that I have known throughout the years who is the head of the mortgage department for all of their branches during the process too.

He offered to advertise on the internet, interview applicants, provide me with the top three candidates so I can vet and approve.

Your loan officer will let you know what you need before you submit the application after a short conversation with you Income and asset documents expire after 60-120 days, so there's no point in gathering your pay stubs, bank statements, YTD profit/loss and balance sheets, etc. 

Now I need a book keeping software, what would you all recommend.

You can get credit report, national background check, tailor a lease application, and even collect rent through it. 

Obviously, they sell appliances, and some of their reviews are not applicable to landlords, but it's a good source, I think.

I need help, I'm looking for a Management software.