Is the 72 hours before the deadline adequate time to get one done? 

This will dictate whether $750 will be adequate for your ROI. 

So one way or another the cash flow will be less and property will be maintained adequately with a higher resale price OR you will cash flow above average and then get hit with a lower price on resale because of CAPEX.

Lots of stability with adequate competition but the inventory is drying up.

Ensure each property is adequately insured and that you have a registered/statutory agent for your LLC.

If your retirement utterly depends on having adequate cash flow from your properties, any downturns will cripple you.

A judgment against you personally can still cause all kinds of problems, so make sure you are adequately insured.

Given that it is only one property, the simplest answer is probably to go out and get adequate umbrella insurance coverage that includes rental/landlord coverage....a $1M or $2M policy would probably cost less than the LLC filing, depending on your state.  

In the event that a price correction occurs in our area, we should have adequate savings for a single family for ourselves. 

If you have them up, make sure they adequately convey the actual state of the house.