I’m active duty Air Force with four properties.

Thank youList on both, it's a probability equation- simple as that.Outside of that % depends on area and many other factors regarding air v.

They rarely foreclose on a IRS lien.

I am 36, own a very successful Air BNB at a local ski hill, and am in the process of looking into the best way to get involved in my father's 54 unit rental property business. 

Should I take out equity in the home towards a crash pad and/or doing some minor upgrades on the home OR should I save up to get into air BNB arbitrage to increase my money flow and put that towards fixing the home and eventually obtaining a crash pad.

The particulars are:Total SF: 5160Roof: Shingles, replaced 2001Plumbing: Mix of PVC and Copper, updated in 2014-2023Heating/ cooling: forced air, 3 furnaces replaced in 2014-16, one AC replaced in 2014Electrical: has been updated periodically from 2014-2023.

Is it a multifamily or single family you are planning on using as air bnb?

Air Conditioning, if an city is hit or miss with A/C units does this play a large factor on rent and/or property values?

I'm just pulling 6% out of mid-air. 

In these instances, you'd have to check things like flooring, plumbing for leaks, roof for leaks, hot water heater, and heating and air conditioning units.