If you're interested in setting up a whole-home portable generator for your house, there's a Facebook group called "Generators: portable generators to power entire house" that I used to help get my house setup. This was one of the first things I did when we bought a new home in summer of 2021. Link: https://www.facebook.com/groups/1716967438485868/
The owner of the group built a guide to all the parts and pieces needed, has a list of electricians and plumbers for install, and he's always willing to help answer questions if you have any. He helped me pick the right interlock kit, breakers, etc. Nice guy, and there are plenty of other people in there willing to help answer any questions you may have.
To do the setup, here's a quick run down of the items and estimated costs of each I used:
1. Generator - Duromax 13000 Tri Fuel: $2000 https://www.duromaxpower.com/collections/hxt-series/products/duromax-xp13000hxt-13000-watt-500cc-tri-fuel-gas-propane-natural-gas-portable-generator-with-co-alert
2. 50 amp power cord from gen to house outlet: $150
3. 50 amp power inlet box to connect to breaker box: $75
4. Breaker for generator inlet: $60
5. 3/4 inch natural gas hose quick connect: $75
6. Optional: Whole house surge protector Siemens FS140: $250
7. Generator manual interlock kit for breaker box: $50
8. HVAC MicroAir Soft Start: $280 per HVAC
Services:
1. Master Electrician to install inlet box, breaker, interlock, soft starts: $600
2. Plumber to install gas hose quick connect and valve: $300
Total cost roughly around $4000 to get everything setup with a portable that I keep in the garage. I wheel it out when needed, which has been twice in the last 2 years, and it does the job of powering everything in the house. The main drawback is that my wife would never set it up on her own without me, but we have neighbors and friends that would be willing to help in the event that I'm out of town during a major storm.