How do I analyze 2 properties on 1 being sold for 1 price?

[Tobi Isaacs]

The 2 houses are being sold together on the same lot for 1 price and they are calling it a 5b/3b (which isn't quite accurate since that makes up both houses-it's really a 3/2 and a 2/1). I can't figure out how to calculate them… do I split the asking price by 2/3rds and 1/3 and put it in my STR calculator? Also if I'm renting them separately, shouldn't I get separate data (occupancy and nightly rate)? Lastly, how do I determine cleaning costs, insurance, etc. Has anyone done this before? Thank you!