New Cottage - home automation/security suggestions

Recently bought a cottage and am looking at my first smart home setup.
Looking for both home automation and some home security.

I had bought a couple months ago a Honeywell smart thermostat and a bunch of WEMO switches. I have installed the thermostat and a couple switches.
Looking for recommendation on what system to go with (Zigbee, Zwave) and what hardware to go with. I have researched some devices and kinda leaning towards Zwave but not sure yet.

Cottage is one floor with an unfinished basement (in process of finishing). 3 bedroom, one bathroom on main floor. Outside has spotlights out front and back controlled by separate switches, and lights above each door also on different switches.

Looking at replacing each light above door with flood light cameras (suggestions on which?).
Replacing all the switches for outside lights with WEMO switches I have already. For indoor lighting in the living room there is a 4 way circuit (3 switches) for the living room fan light, and one switch to turn the fan on and off with, will replace one with a WEMO 3 way switch. Dining room is on a 3 way circuit (one switch is a dimmer, one is a regular switch) struggling with finding a 3 way dimmer switch? Shelly?. Kitchen is on a single dimmer switch, will replace with a WEMO one I have.

Looking to sense temperature, humidity, lux, and motion in living room, hallway, basement. Was looking at a Aeotec 6 in 1 sensor, also some cheaper Aliexpress ones
https://www.aliexpress.com/item/4001308473297.html?spm=a2g0o.cart.0.0.d0333c0077YFmG&mp=1 … Looks like a Aeotec?

Also looking at 2 smoke alarm https://www.aliexpress.com/item/4000219344775.html?spm=a2g0o.cart.0.0.d0333c0077YFmG&mp=1

Mechanical shutoff for my main water line: https://www.aliexpress.com/item/4000464870927.html?spm=a2g0o.cart.0.0.d0333c0077YFmG&mp=1

Water leak detectors: https://www.aliexpress.com/item/32858956186.html?spm=a2g0o.cart.0.0.d0333c0077YFmG&mp=1

Feel free to suggest better or other hardware then the above…

Looking for suggestions for a few indoor cameras as well.

I also want to control my 240V 20amp water pump, and 120V 30amp water heater. Thinking of building a small box with some contactors with 120V coils, and WEMO switches. I know there are large expensive smart switches for this high of amps but I can build something much cheaper and just mount right by my panel.

Other ideas of things to integrate? Haven’t thought much about what I want to do in bedroom yet.

I already setup Home Assistant on a old laptop running Debian.

Thanks!