You should plan out how you pull the cables to the cameras from the DVR / Power supply. A fish tape wire of at least 50’ serves you well to keep the cables unobserved. Each camera comes with a 50’ cable set. If you need longer you can buy extenders for pretty cheap. Ours supports 8 cameras, color video and audio. Infrared for night color too.
Fair warning:
Pulling cables requires some basic skills, including knowledge of what’s in the wall where you’re drilling. Use your ‘electrician’ and you can hide the wires under the soffits with paintable raceway such as available here
https://kablekontrol.com/products/outdoor-cable-raceway
Do not envision visible cables stapled/nailed to the outside of your house (I presume that you own, vs rent): There are numerous ways to hide the cables on any hardwired system.
But in browsing comments, there is one question you have neither given a clue nor been asked by anyone:
Is the camera system intended to be piece of mind and ‘silent witness’, or deterrent? If the latter, any cameras mounted below 12’ high are ripe targets for vandals and easy disabling. Thus if the installation cannot be at least 10-12’ high, special cameras - primarily for public accessible areas, such as porch/front of house - are referenced as ‘vandal proof/dome cameras’. Example:
https://reolink.com/blog/vandal-proof-security-cameras/
An additional feature of any system you purchase might be addition of more cameras, such as a dome camera or, for that matter, a PTZ camera. PTZ cameras, however, are susceptible to vandalism and ‘start’ in price around $3-400.
Universal connections are also a plus for any system, meaning that when (not if) a camera quits, you can replace it with any compatible camera. Some cheap systems are proprietary, meaning that you can’t just replace a dead camera with any other camera.
This is getting into the weeds and the more advice I offer, the less it makes sense without your own personal experience.
Thus my advice to you is to buy an inexpensive DDNS-supported wireless system, get some real experience, and find an online CCTV DIY forum to assist you in both expanding your knowledge and narrowing the vast field of products so your next purchase will be both more permanent and have all the features you then desire.
If I was offering a consult to you, the discussion would entail well over an hour minimum, plus additional time for logistics to prevent runaway installation costs and undesirable modifications to the structure. For example, a wired system requires forethought as to location of the DVR since all wires route back to that box. It would require power, cool air and preferably be hidden. These things take planning by a knowledgeable expert, or from someone with learned experience. That stated, any reputable security outfit - local, NOT the big names - would offer you a consultation for CCTV for a small fee. It would be money well spent to pick the brains of someone with eyes-on the structure and first-hand knowledge of your specific needs/wants.