That might be a stronger motivator!

You don't need a shed unless you plan on keeping things in there after moving out (like a lawn mower if you plan on mowing the lawn after moving out, tools, supplies etc.).A carport seems excessive (I know it gets hot in Texas but a tenant is more likely to drive into it and knock it over - I wouldn't put anything past tenants).As far as countertops go it depends on what the current counters look like.

Contractors are in high demand right now and some trades like framers are in short supply. 

That would make your offers stronger. 

This time we're buying from a contractor supply house rather than from the big box stores.

In prior years, I listed them as "supplies" and split the cost equally among my active properties on Schedule E, but now I am wondering if they should have been "assets" instead.

The house shutoff (versus the main shutoff) should always be after the water utility meter (referring to before and after from the supply side). 

As with any market Supply and Demand play their role.

Most investor offers are lower than value so to make them stronger, higher EMD’s, short contingency period, all cash and quick closings help strengthen those offers.All you need is one contingency with enough time to do your due diligence.

@Bryan ChampHere're a few points to consider/analyze:1) Just like with multifamily, you need to evaluate supply and demand in the area2) What is the MHP size (in other words, how many pads)?