I had to Google the GL7000 to find information on fuel consumption since Kubota only provides 100% load data in the owner's manual. I was working off memory but here are the supposed rates of fuel consumption for the 7.4 gallon tank.
25% load > 19.5 hours
50% load > 16.4 hours
75% load > 13.5 hours
100% load > 10.7 hours
I paid $5,400 for the GL7000 and another $4,000 is not exactly an incremental change. I've been at this house for a little over 8 years and lose power for just a few minutes a couple of times a year. Earlier this year I lost power for maybe 3 hours due to a windstorm, but that's the longest outage I've experienced here. I didn't feel that a $10k generator was a good investment for me and feel very fortunate to have the GL7000 which is a luxury for sure given how little use it sees.
I'd have to go through a list such as the one shown
here and do the math to figure out what I could run on a 7kw generator. As it is, I'm ok with what I have.