>>932807I've come across people on walmart quality bikes doing multi day trips. Pic is the repair I did on a completely busted dollar-store quality tire for a European lady. I disabled her rear brake..
What the other guy said, just craigslist yourself a solid trek or giant with at least V brakes.
Bring portable tools for repairing your bike so tire levers, spare tube, pump, some allen wrenches with BALL ENDS, a good multitool like a leatherman, and zipties + tape for things like pic related. it will limp you to the nearest shop for part swap. Completely rebuild the bike before your trip and you wont have any major issues.
OR
Buy a higher quality bike used, rebuild everything down to individual ball bearings with good marine grease, and enjoy years of low-maintenance fun on your bike. I am a big fan of Surly bikes. Shits steel and I can still ride it in the ocean with no rust (if properly built)..