Quote from @Roger Flot: I was reviewing some renovated listings in my area and one indicated that even though the house was originally built in 1920, because of all the renovations bringing the house to current code, that you could get 2024 rates on insurance. 

If the discount is over 10%, Airbnb may strike through the original price and display the lower rate, which can help with marketing and visibility.Also, upgrading the amenities could make a big difference.

Why do you say its bad for the original owner long term?

I agree with the original poster.

Most individuals can originate the debt these projects require as well so its not as if your signature is opening the doors to properties these partners couldn't purchase on their own either.  

They help prevent after-sale tenant disputes or surprises about matters that originated with the former owner.

Quote from @Joaquin Camarasa: I am originally from Valencia, Spain.

While the interior is nice, the first-floor kitchen and bath are original from the 1940s.

Assume that i got margin with IBKR their calculation shows 5.4% and costs 21.8k per year for 400k.So assuming property is 700k with conventional loan and 670k with cash offer.I manage to find another 270k (this is what I'm asking) without paying any origination fees.

I'm originally from Florida and jumped into real estate after burning all the boats.