[Janet's Husband]

Sergei

Sounds like a great project and good plan.
I would like to add a few things you should consider.

"New tires and maybe new Alcoa wheels"
Make sure the wheels are rated for 2600lbs, not the light weight ones.

While in the axle territory you should have the axles checked to see that they still have a positive angle to them, check them with the weight loaded into the trailer you expect to carry on your full time trip.

"New ceramic toilet"
The Sealand Traveler is great.

"Macerator system for sewage"
Don't like them, too much chance of plugging up, Then What?
.
"Industrial quality designer vinyl, rubber or linoleum flooring"
Cork is warm and soft, check it out.

"New awning fabric at minimum; more likely a new Zip Dee"
Great Choice.

"Fantastic fan"
Make sure you get the Rain Sensor version.

That's my thoughts.