I've done 9 solo cross country road trips to date.
3 in cars 6 on motorcycles. I usually did them in late May going into June. But have done a few in September.
I've done them on a budget in my younger years and as a quasi baller in my older years.
I've been through 47 out of the 50 states.
The budget version my younger years....
I've couch surfed and crashed at friend's parents homes at different points to save on hotels (this was before air BNB).
When gas funds were low, I tried to keep car/bike in high gears and coast as much as I can. Basically keeping in 4, 5th gears back then.
I always have tools and know how to use my tools.
Texas i10 is boring unless you plan on detouring into Austin, corpus Christy, or padre island gulf coast areas.
If car/bike is running good take state roads, back roads and avoid the interstates. Real America is not off the interstates. It's on on the state and county back roads.
If car/bike is flakey, stay on the interstate roads. Easier to get help.
Weird isht goes down at truck stops. Not a good spot to hang out. Get your gas and food from towns or local stations if you have choice. You'll meet locals there and those have ways been interesting. I have many great stories from those types of encounters.
When do plan to do this?