First timer needing some help

[RoadRanger20]

Looking to make my purchase of a bus by the end of this year. I’d like to use it to travel across the U.S. hitting as many National and State parks as I can. I’ve been looking at 4 different ones, but I don’t know the first thing about what to look for besides rust, get a Diesel engine and to stay away from Allison and Maxx force buses. Here’s some of the info from the 4 buses. Please let me know whether or not I should stay away from one of these please and thank you. I never realized how stressful it was looking for a bus.

Bus #1
2006 Ic3000
$8000
Dt466
121,000 miles
30 ft
2 brand new front tires

Bus #2
2002 International
$8.995
127,000 miles
IC3800
Diesel
35 ft

Bus #3
2006 International 3000
50,592 miles
$7,900
22 ft
VT365 V8 Diesel

Bus #4
2007 GMC Blue Bird
Cat C7 Diesel
$7,500
77,000 miles
30 ft

HELP ME PLS!

[o1marc]

Why 3 separate post for this?

[RoadRanger20]

I’m new to this site and still trying to figure out the correct place to post and if my posts are posting. If I posted it to many times for you then ignore my posts. I was just asking for some help. Thanks for your input.