-Detailed inventory and inspection of owners property (this is done for LTR also, but few LTRs are fully furnished and outfitted). 

I thought this could be a good way to take inventory of other situations landlords experienced and make proactive updates to our leases without having to first experience the same fact pattern.

-there is tremendous demand for inventory among both primary buyers and investors. 

Also, keeping track of inventory is important as well (as is a trustworthy cleaner and that can get tricky if you have too much stock).

The truth is that New Jersey, especially Northern New Jersey, is a tough investment market due to low inventory, high competition, and high taxes.

Brandon Turner's Rental Property Investing book is an excellent primer to understanding the happy path for purchasing a property - however in this market it really comes down to having bulletproof assumptions on rents/taxes/R&M/etc. as with rates as high as they are/inventory as low as it is, there is less cushion in your returns if you analyze properties with bad assumptions.

Keep in mind that this is also a very tough time to be entering the market as an agent because the inventory is so low.  

For this reason, I would take inventory of the local banks within your target markets that offer financing options that best serve your real estate needs (again, usually the smaller local banks), and build depository relationships with them.

They are there on time reliably, do a good job managing inventory/off site laundry, and generally do a good job cleaning overall.

Inventory situation is another key element.