Personally I wouldn’t bother with wireless systems . Go for wired systems, usually wired in CAT6 cable. You have 1 CAT6 cable to each camera.
Don’t be fooled by the eBay specials that are cheap. If it’s on your own house go for a good system like HIK vision. Been around for years and pretty much industry standard.
Just another bit of advice, if you’re having CAT6 cables installed get them to add some extra that can be used for WIFI access points in various parts of your house.
If you want I can ask about for you, but you need to pay good money for a good system.