Sounds like experimentation, and it should be perfectly OK if you can keep all of this in test mode, for learning purposes only. You might possibly combine this with recycling, if you visit the right locations for parts (generator repair shops, possibly junkyards, possibly the dumps).
Produce mechanical energy - build a generator out of whatever is laying around, and experiment with producing (mechanical-electrical) power. Use "broken halves" of gensets, where engine is dead but generator and other parts are still reasonable; match that to a dead genset where engine is reasonable, but other parts are fried.
Store energy - from genny to batteries (battery charger), and experiment with different sizes, chemistries, voltages. Start w/ 12v and experiment with what you can power (no inverter needed, w/ 12v DC devices like lights
, etc). Step up to 24v later, and/or start adding inverters to power AC devices. Figure out the wiring for both DC and AC modes (wire size, panels, fuses, etc.)
energy - Find some used solar
panels, mppt and other parts, and try to add that alternative power source into the mix.
Production system - safety systems, backups to the primary parts, etc. Keep it as external to the house as possible, as a fire in the utility shed only affects the shed, but the same gear in a house might be more disastrous in scope.
I would tend to not move any of this DIY gear from test to production, as the diy gear may not hold up to safe production use. But at this point, you've learned so much that you now know what you are doing in all areas, and know how to find the best deals and combinations of equipment, with the goal being to buy or build quality stuff that will provide power for the family (without endangering them). You are "assembling" a quality system out of lego-like components, and saving on the cost of buying a pre-assembled system from vendors.
For all the details, visit forums like "diysolarforum.com"