I can tell you the money is consistent however approvals, paperwork and follow up is what you would need to be good at. 

This method is simple, free, and fast.You could also provide deposit slips, so tenants can deliver their payment directly to the bank.

There is many different ways, key is being consistent.

But if they are not already furnished, the answers above are consistent that having a good team on the ground (Realtor, PM, service providers, etc.) is critical. 

We've rented out some of our best investment properties (New Construction/Turnkey) to Sec 8 residents, and the rent guarantee always helps in achieving consistent cash flow each month.

Let's say you bought a property for $350k, consisting of $275k building and $75k land.

I made a similiar mistake in business, paying $1.1M upfront for promises and had no way to cut losses when those promises were not delivered on.

They had listed it for $40k more in 8/24 and dropped consistently until 12/24, when I made my offer.

I tried to rent one of these buildings for a developer. it was brand new construction, really well done.One after another is was voucher applicants who had criminal records, you had no idea who was actually going to be living there, some were high out of their mind and/or drunk, average credit score was 500, consistent late payments, eviction records, etc.By some miracle I rented one place out to 2 young girls looking to save some money.

If you consistently analyze properties, recognizing a good deal will be much easier when it shows up.