I recommend that you find a trusted or recommended Mortgage Loan Originator (MLO), who can give you options for property-based loans (mostly investment loans) and they don't use your taxes but the P&L of the property.

I have found other 100% financing options as well.

Leverage is key and the diversity of options is also good.

The way I see it, I have 2 options: 1) inform her of her responsibility to turn on the heat or be liable for any damages caused by the cold weather or 2) turn on the heat myself.

But I think the better option is tenant pay for it, that way they will know it may go against them for not paying rent..

There are certainly options to cover mortgage and expenses but even those can be pretty far and few between.

As you are living in the US and might this virtual LLC office work, it could be an interesting option. 

There are risky, but high return options like QQQ which grew 27% over the last year or on the other side / safe end, there are super secure short term US government bonds like SGOV which pays out about 4.5% in dividends. 

Going to try out PayRange, the Shine Pay is slightly more expensive and the one quote about the 20 units appears to be from shinepay as it is the only qoute they ever made... not sure which is better but both look like good options

The cash flow is a bit sub par on this one and I anticipate some larger expenditures coming my way in a year or two so I'm contemplating this as an option.