Helpful tips to full timing in a camper appreciated

Honest question... if 500/month is considered a "fortune" to you, how do you plan on paying for this camper? And not just the initial cost, but the maintenance and licensing costs as well?

I guess I'm just not seeing how renting an apartment that is only 1/4 of your income is considered to be so much of a hardship that you'd rather spend your winters freezing in a travel trailer? People in other parts of the country pay much larger portions of their incomes to rent, and still seem to make it work.