I am more inclined towards selling because I find managing from OOS will be a big hassle.

I would be inclined to order a deck cleaner/wash, a deck paint of your color preference, and general paint/staining supplies (brushes, rollers) from a nearby Home Depot/Lowe's, pay for them, and have them available for pick-up by the tenant at the contractor's desk. 

The back yard has no grass (lots of weeds) and has a steep incline.

I’m technically inclined so will be a quick study I’m hoping.  

Below is the attached verbiage taken directly from the zoning ordinance, for those so inclined:6-2-1 Nonconforming Uses.

You might be inclined to say yes but before you do so consider whether this is really necessary and whether it will affect your property's value. 

I may be a bit old school but I am more inclined to give advice to someone who has posted a background, interest and has specific questions. 

Before finding BiggerPockets I purchased the attached property and while I may have made a different decision after finding all of this information, I did make the purchase (via 1031) last summer and I'm generally not inclined to sell and incur the cost/trigger deferred tax on the property if I exit now.   

I’m trying to put myself in a normal person’s shoes, and I feel like I’d be more inclined to answer a phone call and discuss selling my home rather than responding to a post card or yellow letter.

I would be inclined to push on to finding a new tenant.