I'm mostly a silent investor on that one, so I don't have much control over it.

She is renting the apartment, not the entire property.It's very important for landlords to understand Landlord-Tenant rights and maintain control of the property.

You have zero control over the stock market, whereas when you do private lending, you have significantly higher control and contractually guaranteed return on your money.

Appreciation = Specilation/Gambling.We have little control over the factors that affect it, albeit for making improvements that will force it to compare with other likenpropetoes that are in a higher bracket.

got out of flipping to new construction in our market in columbus ohio. licensed general contractor. when interest rates got high single family existing went down by 30% new builds sold at a 6% increase that year which demonstrated the desire and premium that new construction commands. never looking back. total control, rinse and repeat. we can get permits in 28 days. we can buy land cash in 21 days. we can build in 120 days to 140 days and keep moving. super scalable and easy and no risk. we build the same 2-3 Floorplans 

And they remain owner and control the funding aspects.

well once pandora's box has been opened like this it becomes out of investors control.

If I were in their shoes, I would prefer you pay me directly for control the money used for care and other expenses.

I would also recommend paying attention to the landlord restrictions, rent control and overall laws as it relates to owner/tenant relationships.

Here’s my recommendation to get it under control: For a quick fix, start by sealing up any gaps using acoustic caulk around outlets, baseboards, or other small openings.