Just as an example, a friend of mine was the resident manager at Kihei Alii Kai in 2015 when a first floor unit had a supply line leak resulting in similar conditions.

There's not much of a supply in Bucks County when it comes to duplexes, triplexes, and fourplexes, but you can also start with single family homes depending on your specific situation.

There was a webinar feature on BP with an investor in South Jersey and it was mentioned that in S Jersey in the big tourist areas that there is a major supply for short term vacation rentals but not really for long term rentals which makes it a great opportunity to invest in!

What are realistic expectations  of returns for simply supplying capital?  

It's hard to get a reliable read on the market and understanding what is due to the COVID situation vs. fundamental supply/demand shifts. 

More demand than supply keeps pricing going up. 

The old R-22 is illegal to import or manufacture so the price is going to climb as supplies dwindle.

If you are an investor (or have AMPLE experience) in the above, please post!

Replace return and supply steam pipes for radiators with PEX, run in-wall.5.

It's because of we have decline in supply.