Moving forward if I go down this route I would allow dogs (most of them) and include those necessities such as a washer dryer, other items that not only enhance the stay but add some character to the property.

Some of these surprised me. 

If you’re flipping a house where everything is already in decent shape and functional (roof is new, doors are tight, paint is fresh), but some areas are somewhat dated, what upgrades would you spend $10k on to get the...

If rates go over 5% for any stretch of time, sell sell sellI am a very skilled spec builder so my experiences personally have had enhanced opportunities.

Some contracts have enhanced death benefits with fancy features for an additional cost.  

Does anyone have other suggestions for those valuable skills that I could do part-time while building my portfolio and enhancing my REI skills in general?

My value add will be primarily lowering expenses with site enhancements and bringing lot rent to current market $425 which is already proven and in place on many lots.

They do not provide meaningful oversight or guidance with respect to tax code compliance.A checkbook IRA LLC is an enhancement on the above structure that is generally more time and cost efficient for investors with a more diverse portfolio.

Charging a pet fee of $50/month and a shed usage fee of $25/month enhances my cash flow.

Next is to determine if you can increase the NOI through enhancement in the property, reducing expenses and raising rents which will ultimately increase the value of the property.