I would never want to treat an investor as less than absolute gold and risk losing access to capital.  

Treat this as a normal expense account.  

If the rental is a residential unit, then you need to treat it as such whether he's living there or not.If the rental is a storage unit, then it would fall under different laws.What @Aaron Mazzrillo said makes sense.Everything's negotiable.

Does anyone, Agent or investor, have any advice or guidance on how I should treat this situation?

However, due to mild evidence of activity, such as seasonal swarming, we have had it spot treated with injectible syringes for the past few years, by our regular pest control company, and that seemed to be working fine until recently.  

I'm curious to know how the us tax rules treat properties overseas.

If you are treating them as subcontractors but paying them hourly, there is a good chance that, if they get injured their Attorney will try to get it covered by Workers compensation.

Different lender treat rental income so if your credit union doesn't count it then try someone else.

This summer, guests were treated to a new hot tub and new hardwood flooring in the living room. 

My wife is a perfectionist and gets mired in the details, treating every piece of information with equal weight.