Backup Drive: You must back up your data.
Apple Macbook Air: Apple is transitioning over to the new M1 chips. The new Airs are just absolutely outstandingly fast. And the MacMini has also been updated with the M1.
Lenovo Laptop: Good day-to-day machine with i5 processor and 8GB RAM. Or another choice with better specs. And a 14" model.
Lenovo Desktop: Decent computer with a quad-core processor.
Viewsonic Monitor: An inexpensive 24" monitor. Or here's a better 27" 4K monitor. Or a giant 32" monitor.
Wifi: Eero Mesh uses several boxes to blanket large spaces. There is also the well-priced TP-Link Deco. Or this Vanin is a one-router option with next-gen WiFi6. Also, here is a decent repeater.
Security Suite: No anti-virus is perfect, but on a PC it is a necessity. Norton is pretty decent. MalwareBytes is especially effective for cleaning.
Brother Printers: Most printers disappoint, but these B&W all-in-ones lasers are decent. For color, this HP Inkjet is not too bad.
SSD: We can vastly improve performance and reliability by replacing your hard drive with a solid-state drive. (bracket).
Square: Simple and inexpensive credit card processing.
Splashtop: I use this excellent service for remote access.
Google Workspace: Rock-solid email hosting, aka Google Apps aka G-Suite.
Dropbox: Excellent cloud-based storage.
Dreamhost: Good and reasonably priced web hosting.
Private Internet Access: Use a VPN for security and privacy, especially on public wifi.
Other Recommendations: WiFi dongle. Thunderbolt 3 Dock. USB-C hub. Webcam. External DVD/CD. Ergo Mouse. Bluetooth Mouse. Office 2021.