Let's take a real example: I'm renting a condo 2bed/1.5bath for $925/mo right now - it's listed yesterday.The owner bought it for $17K, invested $5K - new cabinets, flooring, HVAC, HWT, paint.

(This is just for property insurance, liability coverage is important too - since most people don't have the hundreds of thousands a liability claim can become)

As @Nolan Martineau stated, each property will have different Capex due to age of furnace, water heater, roof, AC, cabinets, etc. etc, etc. 

We spent a few month making it very modern and attractive - moved W/D upstairs, new appliances, removed walls, refinished hardwoods, granite, new cabinets etc.  

New cabinets, floors, doors, trim, windows, light fixtures.

A lot of people (billion) use these companies platforms daily so idk but perhaps hundreds of thousands actually picked.?

There are literally hundreds of variations on Real Estate Sale & Purchase Agreements.

A few hundred bucks could save you thousands in taxes.You could 1031 this one into another property is that aligns with your near term plans.

If it were not for the people paying a few hundred dollars a square foot, there would not be enough funds for the amenities and "shared resources"Also, looking for people who work from home is not your best market.  

Without quality people I'd still be managing a hundred houses by myself instead of 1250 units with my sites on 2,000 and beyond!