I'm a licensed contractor focused on interior remodels, and a realtor as well, reach out if you have any questionsBest,Ryan

My landlord insurance will have to cover the costs of fixing the interior like replacing carpet, interior painting etc.

The most popular STR listings in my area have excellent interior design.  

The interior was outdated, the landscaping was overgrown, and several deferred maintenance issues were apparent.

Adding and making better could sell or rent faster, but it won't get you more than what the market ARV and rent is set at from other similar comps in the area....and your Interior Design background will help, if you you it mostly as an understanding of cost. 

I will tell you he did a great job because very little interior re-work was required - but it was a substantial hit to the Reno budget!

The interior was outdated, the landscaping was overgrown, and several deferred maintenance issues were apparent.

This property was in rough shape, so I tackled the essentials: new roof, plumbing fixes, and updating the interior to make it livable again.

You are roughly 50% completed, the interiors will cost more than you think.

So, I would only recommend doing it when there are synergies to take advantage of such as the partner having a skill like HVAC, interior design, accounting, etc. 2.