Only use only router. Gigabyte switch for sure. We usually run POE (power over ethernet) switches. This allows us to power the wireless access points (WAP) from the switch and you don't need any external power cables plugged in for the WAPs. This is what I would recommend for sure. Another advantage of a POE switch is if you want security cameras in the future, they plug in and get power and network access just like the WAPs.

I will agree with USMC88-93 about the "Mesh" wireless. This is teh only way to go. It has gotten a lot cheaper to do these in the last few years.

Non of this gear is really "cheap" but if you do it the right way now, it will work well and you won't have issues later. Feel free to reach out to me if you need help or want hardware recommendations.