This is more of the quality of system I would go with, any cheapo options are gonna be more of a headache than a productive setup.
UNBOUND Lodge Off-grid Magnum System for 24 REC Modules
www.wholesalesolar.com
Most of the charger/inverter equipment is the same, all imported from China, different badges stuck on the front.
I've gone for distributed solar generation with no batteries for most of my system using Suoer 600w (+2 panels) and Suoer 1000w (+3 panels) GTIs.
(work still in progress) These will repay themselves in 3 years, hopefully they will last that long, only 6 months in operation so far.
Only my living room has a battery/inverter ready for TEOTWAWKI, handy for power cuts.
Your 'really expensive' system has two problems.
1. After the end of the world, no parts will be available and one fault will likely crash your entire system.
2. Equipment costs are dropping fast (30% less in the past year) and your equipment will be out of date before it pays itself off.