But what I have been seeing was 6-9 months of non-revenue periods just in the pandemic period. 

I will base the following example only on lost income due to vacancy over a ten-year period.

I decided on 2 week inspection period.  

Deploy some money periodically into Airbnbs in popular vacation areas (National Parks, beach towns, etc.) that will bring me some solid cash flow.I'd love to network with other investors at various stages of their investing journey.

After a period of time, it became clear that we were not going to be able to work through the repair process without putting ourselves at risk of having future issues or disagreements.

They're on month-to-month with long-term tenants who haven't seen a rent increase in years.Have a nine (remaining) day period to gain access (due to tenants), assess conditions, and either continue or pull out of the deal before earnest money is due.The problem we're experiencing is that buying as a package strains our liquid reserves to an uncomfortably tight level.

The combined time period the relinquished property and the replacement property are held in the QEAA cannot exceed 180 days.Note: In Estate of Bartell, replacement property was “parked” with an EAT who held title to the property, but who had no benefits or burdens of ownership.

The truth is, you could read 100 books and still not know enough because certain things need to be learned through trial-and-error.

During the feasibility period I'm planning on conducting the usual due-diligence with a thorough inspection of all the property's systems and structures (utility services, roof, HVAC, maintenance history, lot survey, tenant interviews) along with a Phase 1 ESA. 

If they left behind items that have value, you may need to store for 30 days or some period of time.