Off-grid Tiny House Research

So we are considering building an off-grid DIY tiny house that is "prefab" to a certain degree. Below is some research:

Design

We are basically planning to do a knock-off of this home:

Lapinha Studio by Plano Livre - Dwell

Construction

We want to use SIPS for the walls and roof, and possibly the floors.

Information from About SIPS - West Eco Panels Ltd.

"Panels generally weigh less than 4 pounds per square foot, making them light enough to install by hand."

Doors

The majority of the glazing will be sliding glass doors:

ENERGY STAR Most Efficient 2021 — Sliding Glass (Patio) Doors | Products | ENERGY STAR

JELD-WEN FiniShield V-2500 72-in x 80-in Tempered Grilles Between The Glass Bronze Vinyl Left-Hand Sliding Prehung Double Door Sliding Patio Door Screen Included in the Patio Doors department at Lowes.com

Heating

Best Vented Propane Heaters for Tiny Houses (tinyhousebloom.com)

Amazon.com: Martin Direct Vent Natural Gas Wall Thermostatic Heater, Indoor (11,000 Btu - Glass) : Tools & Home Improvement $874.99

SMALL STOVE: The Dwarf 5kw - Tiny Wood Stove $995.00

Electric

The Best Propane Generator Models in 2021 - Top Picks by Bob Vila

Amazon.com : DuroMax XP5500EH Electric Start-Camping & RV Ready, 50 State Approved Dual Fuel Portable Generator-5500 Watt Gas or Propane Powered, Blue/Black : Patio, Lawn & Garden

Plumbing

To keep it simple we are doing minimal plumbing.

Composting toilet:

Nature's Head Composting Toilets -- The Official Site (natureshead.net)

Grey Water system for filtration of minimal water waste

Greywater Systems for Sale - Water Wise Group

Off the grid approach to dish washing

How to Wash Dishes While Camping - Fresh Off The Grid