We install geothermal loops and install underground utilities (mainly via horizontal boring equipment).  

The electrical outlet that was moved to the left of the sink was installed horizontally, where as the other outlet to the right was vertical, as was another outlet they moved farther along the countertops.

Depending on how bad is the foundation state (how many inches you have to correct), is very possible the sewer line will disconnect/break in the horizontal portions.

However, in the basement, there is a few horizontal cracks in the wall.

Horizontal cracks in the foundation is a problem that can absolutely blow this deal.

when running supply through attic, 2017 Florida Building Code - Residential requires only hot to be insulated, but make sure you insulate the cold also (attic is 140 F in summers).Code allows a pan for water heaters - in Florida, we add a pipe from the hole on the side and run it horizontally thru an exterior wall, similar to a condensation pipe drain. 

This involves balancing, tipping, chaining, tipping some more, swinging, and lots of careful hydraulic work on the front end loader of the tractor to get the 18 foot pole from horizontal on the ground to vertical chained and strapped to the forks on the front end loader of the tractor. 

How you do that is with a piece of horizontal trim right about the place where the first and second floor meet, preferably with a darker color siding above that dividing line.

Is the crack vertical or horizontal?  

On all my MF properties I install horizontal blinds for windows, and vertical blinds for sliding doors.