Per my request they sent me a YouTube video (see above) where it’s placing a bracket to hold the filter and disconnecting the cold water faucet hose from the shutoff valve, then installing a water supply line adapter to the cold water faucet hose.

In regards to demand demographics, yeah I think you'd be targeting a different group, and supply/demand has to be looked at closer. 

I always took my guest there for wine tasting in his Cellars .. eclectic guy and got to sit with him a few times and he regaled us with stories of being one of the first late night TV RE guru's .. he has done quite well in the wine bizz though..

Also, Ive bought office supplies, went out to eat with contractors, and more, should I be using a business credit card? 

Have that agent you are working with supply the inspector and/or the contractor too.

Insulate, add electrical, mini-split ac, and possibly plumbing, as desired, drywall, tape and paint, put built-in cab's on one side if you want, hang the tv, speakers, etc, install bi-fold/multi-fold doors on the side leading to a patio, and replace the garage door with an insulated one keeping the track and removing the motor, or install a carriage type garage door into the existing garage opening.

Rehabbed most of the stuff myself except for supply lines in the plumbing.

So sometimes I have clients who recorded a deed on their own (they got a template from an office supply store and sent to the county to record), but that can be a problem since the title companies are very wary of fraud. 

They keep track of my inventory and go and buy supplies when needed.When you select an offer from a cleaner on Turno you get to see the host rating and the Airbnb guest rating for cleanliness, so that helps you make a choice.

Meanwhile, another local credit union starts to buy the market, but it's not like you'd know it since there are no TV commercials for mobile home park mortgages.