A man after my own heart!
OT I know! I have a 2018 Chevy Equinox SUV - Diesel model and I get 700 - 710 miles (46mpg) on a 15 gallon tank (on the highway). In town I get about 530 - 550 miles per tank (36mpg). I have a little over 50K miles on the vehicle. It has been a great vehicle so far - almost 5 years old!
CD rates as a whole just aren't that high. With the Fed raising interest rates, CD's are definitely paying better than they did last year and may continue to increase, but I think you're out of luck if you're trying to find a 6 month CD paying 7%
He and his spouse can put $20k total, and if they have a refund coming, can get another $10k that way. Any LLC can also put $10k in. With him already owning a bunch of land, presumably at least some of that land is in a business entity so that's $40k out of $200k that he can get in over the next few months depending on when his return is due.
You can get around the $10k per year per person max for I-bonds with the "gift box" feature. Still might not work for the original poster to get $150k invested, but if you're married with a few kids you could get $100k invested right away and only tie it up for two years.
No, the gift box can be any amount and can be electronic. You get the full economic benefits as if you actually owned it, but it's segregated in the "gift box" until pulled out of the gift box and placed in the recipient's name. When gifted, it counts against your $10k max contribution for that year. It's a good way to get a larger amount invested to get the benefits of the high current rates and to start the 5-year and 1-year clocks running right away.