They probably did not quote exactly what you asked for because they knew you would never pay the cost to make that all happen. Your thoughts is how most of us want it to work until we see how much that would actually cost then we reconsider it. Unless you are rich and money is no object. If that the case I am sure I would not be typing a response to you.
I would suggest going grid tied and buying a generator for the outages. (to keep cost in check)
You might think about a self-install. Look at these two installs. (keep in mind the pricing they posted is old my pricing is much more current)
Look at Gary’s system
Designing and Installing a Grid-Tie PV System
System and Doug’s system
Doug's New 4.6 KW micro inverter DIY Grid Tied PV Array
Doug's New 4.6 KW micro inverter DIY Grid Tied PV Array
Look at my install
http://ecorenovator.org/forum/solar-...lar-array.html
This is a 12.5 KW Enphase system self-installed for just over 21K (Cost before fed and state Tax credits 55% in my case) all wiring every screws everything. That includes upgrading my main load center to a 225 amp box.
I personally think micro inverters are simpler install for the home owner. This will all go together much quicker than you think. You are posting to a DIY forum that likes to save money