You'll be looking at 2-4 AH to run the gear you describe.
For a 8hr night, say 24 Amps total for the night from your battery max.
10/4 x 24 = 60 AH battery (assuming 40% max drain)
About $150 on ebay for a decent 60AH
$50-$100 for decent 3 or 5 stage charger
Up to $50 for a battery box.
$40 for Jaycar DC-DC power converter to run the laptop.
https://www.jaycar.com.au/60w-regula...aptor/p/MP3478
Invertors will significantly increase your power usage and cheap ones may not be kind to your sensitive gear/laptop.
That's doing it old-school with lead acid AGMs. No experience with Lithium batteries sorry, but likely to be more expensive again.
Larger battery or some charging solution during day or some of the night would be helpful (e.g. generator or large solar panel). You always end up using more power than you plan, and very cold weather doesn't help if imaging in winter.