Hard surfaces like LVP, tile, hardwood are easier to maintain long term and tend to last longer. 2.

It may require you to maintain a specific liquidity ratio over the life of the loan, or maintain cash reserves equal to a specific number of payments, or upon inspection prior to the loan being Funded, Require you to come out of pocket with cash, for instance, to replace the roof because it has more than two layers on it, replace or grind concrete that has heaved, or embark on a program of replacing balconies that have rotted within a certain amount of time, et cetera...

Lastly, maintaining a positive mindset and staying persistent is crucial.

These will be the people not just living in your property but maintaining it to a degree.

I have an apartment that is set up as a 55+ complex historically but there is no deed restriction requiring it to be maintained as a 55+ complex. 

Improve Efficiency – By classifying and identifying the various components of your property, a cost segregation study can help you maintain and manage the property more effectively in the long run.

I have met very successful investors that take deep dives on NPN commercial notes and immediately go in and have one of their companies appointed as Receiver of the property and collect rent and maintain the building.

Will they be able to maintain that charge against the unit when a new buyer comes in? 

The person has to qualify and be able to have the where with all to maintain the paperwork.You are talking about cosigning then worrying about taking his property?

It doesn't add a ton of cashflow, but $50-$100 / month for a space you don't really have to maintain or market much is always a welcome bump to an already good deal.