However, I suspect it's going to come clean or else they would have applied together to begin with.

As Jack below is mentioning once its a fixed its real property and unless there is something in writing I suspect it cant be taken. 

If you study the market, you should know what additions/upgrades will net you more dollars or make the property more appealing.I suspect this project is going to eat your lunch but it will provide a learning opportunity for your next attempt.Pouring concrete to level the floor?

You might find some people who are interested in downloading their experience and expertise to you but I suspect many won’t. 

I suspect they will be expecting a rent increase knowing they are paying below market currently. 

I suspect that the thieves tried to steal my unit.

@Bingji Wang I suspect that it means that it is exempt from property tax.

Some (I suspect) are just tired of dealing with the type of renters who focus only "private" landlords (the "looking for a private landlord" postings are an instant red flag for me).  

I suspect these contractors are thinking about what is easier for them.

@Matthew BarbacciaHowever I suspect if your construction cost is $200k+ you’re probably doing something that needs to be filed.