Some things to think about:
It can’t be totally wireless, unless as you say you’re considering solar + battery. You have to have a power source.
Do you need an outdoor-capable camera, or is indoor-only OK?
Most Wi-Fi isn’t good beyond about 100 ft. Will that work, or do you need special antennas or wired ethernet?
I only need the wireless for a couple of outdoor cameras and same indoor. I do have power inside and out and will use batteries as necessary. Yes, I think 100 foot range will work if it penetrates thru a shop wall.