Renting a campground for 6 months is cool, but what would you do in the winter? Where would you take the electricity (inb4 you don't need it - not vital, yes, but having it may cover for several issues that you might encounter).
All the info mentioned assumes that you are not a jobless penniless faggot, but rather a man caught with the jaws of fate, and just trying to fight his way back.
This is a mix of stuff I've been using myself when I had it hard, some stuff I do now, and some stuff I think that is a good idea overall
In general, you just have to follow several principles:
1. Food and water - water can be either cheap or even free in some places, mostly in places that have underground creeks and stuff like that.
Frequent malls often for promotions, don't be afraid to steal a minor item or two from big grocery stores, prefer (((multinational companies))) if you can, just be extremely careful about it, and if caught once, apologize, deflect, pay for the item, and never attempt again in the same place. You can visit it, just never steal anymore.
Buy yourself a pack of vitamins - go to the mid-to-expensive drugstore and ask for multivitamins and tran that are about to expire, and you can often buy them for very cheap - I got some vitamins for as low as 20% of the price, and they had a whopping month until expiration date still. Vitamins and tran are vital to not get damage from a shitty diet that you will be having almost guaranteed.
Some places sell mre main courses or other canned meals for not so big prices. I have bought some calorie-dense military grade foods for very cheap (a 400g portion of pasta a la bolognese for 1.2 dollarydoos for example, or a pack of mre crackers for 20 cents). Not a sustainable solution (although vitamins may help), but may work out for surprisingly longer than you think.
2. Shelter. Try to get something semi-permanent. If you live in a mild climate, buy yourself as good of a tent as you can afford, and try to rent camping grounds as was suggested. It is often cheap. Do not use it to store anything that may be attractive to be stolen, just have your basic stuff in there, and maybe a few inexpensive things hidden that you can't afford to carry around. Layers are important, use a foam underpad to not freeze from the cold soil. You can try to make yourself a thatch and mud hut, if you will be allowed to do that - excellent sleeping aid, and is usually fire-safe, so you can have a firepit in there.
3. Basic (and not so) needs: showers (possibly, a locker as well) can be covered by gym membership. Can't find a cheap gym, go for a cheap pool - good exercise all around an hour every other day will help you keep yourself in human shape. Showers every other day are also well advised.
Laundry - there are laundromats, possibly the cheapest option.
Toilets - try to find a place where you can go to the toilet without much of a fuss, and bonus points if it is kept relatively clean.
Clothing - relatively easy nowadays. Visit outlets, visit second-hand clothing shops. Take clothes someone left behind, inspect them for biological material (lik blood, etc) clean them and wear them.
Always have good shoes and socks!
Those are the most important part of your wardrobe (second are weather items like plastic poncho, coat, hat, etc). Try always to get the best protection that is the most convenient. If weather is appropriate, use military clothing, it is usually cheap / durable.