Suggest he buys a month's storage at a storage place.

Or you could even diversify to anything lower on the risk list, like strip, net lease, self storage, student housing, mobile home parks, etc..

If you're holding as a rental, I would only finish the basement if you solve the moisture issue first; otherwise, you're opening yourself up to angry tenants if storage boxes, furniture, etc get wet.

@Jen Faulkner we offer Netflix, Hulu, and Amazon Prime channels along with signing up for the channel apps using either the smart tv itself of a device like Apple TV, roku, or chromecast.

You could convert to storage, or You can also subdivide the space in advance depending on your market and the demand. 

One unit needed quite a bit of rehab to include flooring, paint, refinish the cabinets, water heater, new siding on the storage shed on the back, new front door etc.

It is a converted attic often used for storage.

Alternatives (self storage)Self storage ?

Raising rents, 2. increasing income by charging for laundry, parking, storage. 3.

You can hand out passwords for each paid apartment, and each password can be used on a limit if 5 devices.