Someone else can probably explain this properly, but I believe the fusion reaction inside the Sun ends up leaving it as all Iron. Something about the fusion reaction past a certain point can't produce elements higher than Iron on the period table.

Edit: https://www.ck12.org/flexi/chemistry/nuclear-fusion-in-chemistry/why-do-nuclear-fusion-reactions-stop-once-nickel-and-iron-are-formed-in-the-core-of-stars/

> When very massive stars leave the main sequence, they first become red supergiants and then end their life cycles in with a bang. Unlike a red giant, when all the helium in a red supergiant is gone, fusion continues. Lighter atoms fuse into heavier atoms up to iron atoms. Creating elements heavier than iron through fusion uses more energy than it produces so stars do not ordinarily form any heavier elements.

This. There are drain holes on the bottom that need to be able to flow to the inside.

yes most single family rental homes are owned by "mom and pop" landlords, and that's generally not seen as a problem.

if you want actual stats:

> According to data from the 2018 Rental Housing Finance Survey, for example, individual investors owned approximately 73 percent of single-unit rentals in 2018, compared to 23 percent of apartment homes in smaller properties (5 to 49 units) and just 7 percent of apartment homes in properties with 50 or more units. In that same vein, a recent Altus Group study estimated that institutional investors (firms with portfolios of over 2,000 properties), despite controlling over half (50 to 55 percent) of all U.S. apartment units, owned between just 2.1 percent and 2.5 percent of all single-family rentals.

60k is nothing on the scale of the country.

> Institutional owners still comprise a relatively small portion of the overall market, about 350,000 units, or 1.5% of the existing 23 million single-family home rental units, according to the National Rental Home Council. But in certain target markets, the concentrations are much higher.

No, it's been overstated.

The two largest companies, Invitation and Starwood merged to form the largest institutional owner of single family homes, and they have a total of 80,000 units nationwide (out of many millions total of course).