Depending on if this is a full rental or house hack, you can use market place and Craig’s list to find cheap furniture for common areas.

A- All Utilities and Furniture Included – In this model of management, all utilities are placed in the owner’s name.

Many people get excited when they buy a new tv, or a new car, furniture etc, I get depressed, it's more like getting teeth drilled than anything else.

I think it would be wise to get your own eyes on the property, and setting up the furniture, but I bet you could hire it all out if you wanted. 

Takes about 100k (55-65k DP + 35k furniture/labor) investment to get one unit up, when purchasing. 

Furniture, food left overs, toys, clothing, appliances.4.- Getting rid of any infestation.

However, they keep leaving a pile of junk (boxes, furniture, etc) out on their driveway.

We'll upgrade a few things, but much of the furniture came with it.

We own a house rented to college students and need to replace the living room furniture.  

How about this idea.What if your Dad sold his hoarder house and put the hoard in several small storage units.Then you and he move in together and house hack something bigger (but that unit is known as YOUR unit--he lives with you).Both share management responsibilities sensibly and also profits and losses as partners.All new hoarded hoard things MUST go into a small storage unit.Or keep the hoarder house and rent it out--but that keeps your down payment cash pile the same.You can buy all new furniture and mattresses at IKIA or Target and have a fully furnished apartment on the cheap.