So just do bank statement loan if your monthly 'revenue' can support it. 

I won't be investing in the riskiest/most supportable asset subclasses such as hotels, and tilt my portfolio the ones that have historically been more stable such as multifamily and single-family housing.

That being said, if I were the tenant, I'd say they were emotional support and then NOTHING can be done.

If your priority is cash flow, then you need to look at markets that support that.

As a part of the partnership with the state of Virginia, which included $750 million of Virginia taxpayer money for infrastructure improvements to support the Amazon HQ2, Virginia is offering Amazon $550 million in grants for hitting that hiring goals, and an additional $200 million for hiring 12,850 more employees from 2030-2034.

This is you and you only; no support staff. 

If so, do you have any paperwork that supports the vesting to be able to show a potential lender? 

If these folks owned their own home prior, I would probably take that as them having better credit at that time even without a credit report to support it. 

Best of luck with selecting your market—there's a wealth of knowledge and supportive investors here to help guide you along the way.

The ways around that are to build a business around supporting their voucher and inspection program and spending no small amount of effort ensuring they are smoothly servicing your rentals.