You intentions are well grounded but, I must say I take issue with your description of a man that had valuable skills. The irony of the perception of what some people think of a person's skill as being "valuable" I suppose...
There is the white collar workers sitting behind their desks daily in nicely lit, climate controlled offices while making nice big comfy salaries while "working" all day, operating a keyboard running spreadsheets or doing marketing sales strategies etc. ...
While somewhere men and women are out in the cold or hot sun digging trenches, pouring concrete, roofing, plumbing, electrical, HVAC, etc,and going home dirty, with sore hands and backs for modest wages. ...
Their efforts will ultimately give some keyboard commando a nice comfy building to sit in and "work". Their efforts have built something of substance, something of value, a solid object that can rise hundreds of feet in the air. An object that only came in to existence from the hard labor of the skilled craftsmen's hands. ...
The fruits of their labors can be seen daily by anyone passing by, used by someone to have comfort in their home, have their job in, or even sustain their life in, in a hospital that was built by their hands. They built something that can be appraised, sold, invested in and renovated, all the while providing more valuable contributions to a working society ...
While the keyboard commando pushes the "print "button, reads what they have typed out and doesn't like it so they wad it up and toss the piece of paper in the trash can and start over. ....
Yes I know, we need the paper producing people to exist and to work at their professions in order for the skilled trades people to exist. But basically it is the old, which came first conundrum ? The"paper or the wrench" ?? One profession cannot exist without the other. So, which of the two professions is most important and should be held in the highest regards ? ...
But to call skilled craftspeople like the OP family member that worked with his hands as a plumber a "redneck" ??? Contrary to what most people seem to think nowadays brought on by the redneck acting "reality" shows,
"redneck" is not a term of endearment. Off of my soapbox now.

JMO
To the OP, your project is commendable and going nicely it seems.