Sounds like DSCR as mentioned already would be the easiest way for that and wouldn't see any issues with owning/renting.

Some lenders may also want to see law and ordinance coverage in your insurance and perhaps a rebuild letter from the city stating that the property could be rebuilt as a residential 4plex if destroyed. 

I have always been interested in home construction techniques that are different or older.Container homes, these sorts of shot-crete homes, bale homes etc.The biggest issue is not that fact that they will rent, for if they are in the right location, of course they will rent just fine.

Majority of my target market is International Students, serious about their Studies, not interested in causing issues.

Depends on the Class of the property/tenant.Class A, you may just have occassional maintenance issues.Class B, more maintenance issues, some tenant payment issues, some tenant drama.Class C, a lot of maintenance issues, a lot of tenant payment issues, a lot of tenant drama.Class D, too much to list.

Overall, I've closed on multiple properties with them before and had no issues.   

Part of the issue depends on what market your buyers are from and where they live..

There's a good chance the issue(s) you face has already been discussed and answered.Ask questions in the appropriate forum.

The house has some "hard" issues: 1. pretty steep hill in the front with stairs to the front of the house.

Is the buyer going to have the same issues with the property that you’re having?