I work with timber with my dad on the side which in 2014 brought in a extra $42,000.

Extra important with the long distance involved.

This was a once a year thing, and they hadn't complained when the upstairs neighbors had had a party at Halloween, or when any of the people below them had parties.My feeling is that the truth was somewhere in between.  

At $9k/year savings, that's an extra $45k that goes to paying down your principal in 5 years. 

The house is a 3 bedroom 1 bath, as well as a loft and an extra large yard.

Calculate how much extra this tenant's habit is costing you and factor it into the rent or add an extra charge for excess utility use.

All of my current properties have 12 years of a 15 year note left so I will need to make extra payments to meet my goal. 

I say go for it just screen the tenants extra thoroughly I'd really aim for a low key tenant.

Truth is...I don't have time to allocate to doing those things and be effective (or perhaps in part because I'm lazy, sure).

You should charge extra for the parking spaces, and make them private.Looks like the average unit there runs about $700/mo, so yeah, I'm say you're substantially under market.