From a rental perspective things are definitely taking a bit longer to rent and it's becoming more common to see concessions than 1-3 years ago.

The answer will depend on how you and your partner acquired the property.Did you acquire the property as tenants in common or through an entity?

But, the most common problem with DSCR loans is when the DSCR ratio changes from the loan officers initial estimate. 

Really common when we're doing projects like that.

A duplex or ADU could work, I was interested in single family houses because in some locations Duplex's/ADUs are less common and SFH typically cost less.  

Those all seem to be common pain points for owners.

The most common pattern I see is landlords just... holding.

I recently placed in a class a unit (almost $2k/ft value) because it is beach unit and expect higher water contact (normally class a gets real wood).Carpet in common areas in short run is cheap but long run will cost more than concrete stain or LVF.  

Common beginner strategies include house hacking, BRRRR, buy and hold, and flipping.

The Premises and all common areas are fit for the use intended by Tenant;2.