I also renovated houses and own an interior design and renovation business. 

There is no given answer here, because the whole property needs to be relatively consistent.Kitchens and baths are the common answer, but if they are passable and you choose to invest in them anyways at the expense of peeling paint (or off putting exterior color) and overgrown landscaping, the appraiser and tenant will be walking up with a bad taste in their mouth, thereby not valuing the interior work you have done.But think about the general flow of someone looking to rent: more bedrooms will typically dictate more rent.  

Something I've been concentrating on internally very much lately. 

Hi Rosa,2 questions.What kind of minimum down payment is required there for apartment buildings if a buyer is a United States LLC (or does it require a Mexican IBC (International Business Corporation) to be the buyer)?

In an ideal world the investor, a partner, an interior designer, or for larger investors maybe a project manager would be able to collaborate with the contractor(s) on these things.

In my area if you are putting up interior walls permit is not required.

Do they take pics of interior at move in and have tenants sign each pic? 

Many lenders are using an internal construction loans to replace Homestyle, ChoiceReno, and 203k out of simplicity.

Of course there are other things that can happen that are out of the investors control such as an internal audit but outside of this, it would be super expensive and time consuming for lenders to randomly review all of there loans without cause.

Numbers get inflated by international students who are not, on majority, buying homes or staying past their schooling.