Like @Caleb Heimsoth mentioned, I put the most stock in eviction history, criminal record, and ability to make payments (3x rule).  

You can use lending that doesn't need history with the LLC, look into DSCR loans.

Income verification, Credit report, public/court records, employment and prior residence histories, on-line presence.

Look at history.  

In my experience, apartment complexes are generally slow to respond to requests to verify rental history.

There's several cloud solutions, but they don't interest me since I can't import my transaction history into them.

We have done 4 deals, during tax season I now send him my tax return and W2s so I have 1 less thing to send him when applying for a new loan, by doing this he can review my finance and give me a heads up if he foresee any issues in obtaining a loan.Nothing wrong in going to someone else if they give you a better deal but if you find someone that goes above and beyond and you have a history with it just makes things go easier..

I would make sure you have created a rental criteria that outlines income and credit requirements as well as how you will treat those with a criminal background or eviction history.

A good note (good borrower, good collateral, good payment history - i.e., a low risk note) just does not sell for that kind of discount.

Christine Gardner to answer your question specifically I would say that total work history needs to be examined. of course the longer they have been employed at their recent job is a factor but the reason they have made a recent change and the history over the past 5 years is a better indicator than a picture that only looks at the most recent time frame.