Do you really like them that much that you are willing to supplement their rent?

If he really is that allergic to them, then he should've asked.

Me, it would cost several hundreds to fly out from LA, plus vacation time, plus car, plus hotel (I can't stay with my daughter, I'm allergic to that mutt of hers).

I've done this and plan to do more to supplement my retirement.  

I stumbled into real estate investing while looking into ways to make passive income to supplement my regular job. 

This means you cannot use the money in your own interest, so these accounts will likely be a good supplement to investing you do outside of retirement funds, not a replacement for it.

Would we not all supplement our good tenants rent by $200/month.If a landlord is operating a business in which costs rise annually why would they consider lowering their tenants rent when the market does not warrant it.

Plus hold money for property taxes plus the dreaded supplemental tax bill that will inevitably show up.

We used masks when breathing when we disturbed surfaces, as I am allergic.  

As for market rents, unlike many landlords I do not believe a well run business supplements tenants rent.