Your estimated first-year NOI is $29,040, but after loan payments, you're left with a negative cash flow of -$9,126 and a DSCR of 0.761, indicating the income doesn’t cover debt service.

.$10k STR rent on $1.3m property at 80% LTV  will be negative cash flow when properly allocating for all the expenses.  

If you want to discuss more you can always send me a private message but so far I don't see any negatives with purchasing the multi-family.

I got a 2013 Toyota Corolla for $17k, so unfortunately, even if I trade it in I still have about $6-9k in negative equity on the car that I’ll still owe.

The bottom line assumes that your overall cash flow will go up from acquiring this new asset, which existing property, when you leverage will have the smallest negative impact on your overall cash flow. 

This creates a negative initial position.

Insurance rates stand to rise dramatically, so the question is "will the insurance rates go up enough see rentals go into negative cash-flow situations?"

However, I am seeking recommendations for the most effective tools and software for remotely managing my Airbnb properties, as I will not have a local short-term rental manager.Specifically, I am looking for software that can assist with property listing, pricing optimization, channel management, guest communication, and any other relevant aspects of property management.

So if someone tells you, it does not matter about liens behind you - it does.There’s one more ; the borrower has increased debt service and when it either turns negative or leaves nothing “in their pocket” they may lose interest in the property, decide to stop paying all mortgages, and put whatever income they can into their pocket until they lose the property to foreclosure or one of the lenders obtains a court order prohibiting such.   

Additionally, each deep clean after a mid-term stay costs around $300 or more, which almost negates the financial benefit of the mid-term rental model.