I have been beta testing the JP Morgan "Story" platform over the last year, and it has been extremely useful for helping to scale my firm's multifamily investment portfolio.

I bet those carrier representatives have access to their companies AM Best reports, and would be willing to share those details with you. 

DSCR is the best bet to get something like this done.There are products with no seasoning requirements and products with 6 months seasoning.

For example, All data for NY in Suffolk County and Nassau County on both platforms lags behind by about 7 months to a year.

Going the attorney route will take time and money, but it could be your best bet if the developer refuses to renegotiate directly.All the best!

@Andrew CarlsonSounds like she’s running a business and I bet that’s against your lease agreement.

Which platform generally is more accurate and are there other tools out there for this? 

It’s already listed with a local agent, but I’m looking for additional platforms that specifically cater to selling Airbnb or short-term rental properties to investors in the USA and Canada. 

I'm not a lender so make sure to double check, but I believe the DSCR loan will be the best bet.

BP hosts have promoted it, but I can't say why.Other platforms out there too.