Not to disagree with you gentleman but yes it can be done.
Several things have to be taken into consideration:
1. No perm home, no mort payments, no outside bills
2. Your van needs to be a stealth camper, complete with potty microwave, inverter for elec, and most importantly a coffee pot
3. You need a better detector, sorry, plus u need atleast 2, one a dry machine and second a water machine, plus backups are reccommended
4. You camper is setup to charge your spare bat sets while u hunt, solar panel works great
5. WiFi laptop so u can send and receive emails and check current spot prices on gold and silver
6. You must have a base camp somewhere, parents home, girlfriends, ex girlfriends etc
7. A bank acct that has offices up and down the coast
8. Contacts in different towns up and down the coast
9. Do not limit yourself to one area, research lakes, swimming holes etc there are over 10,000 miles of beaches saltwater or freshwater in this country.
10. Learn your equipment because you will be competing at almost every beach with the local hunters
11. Realize you will be working harder doing this then most that punch a timeclock, are you up to that physically
12. Realize you will be working 7 days a week (hate calling it work but it isn`t easy)
13. You need a good grub stake to hold you til the finds start coming in, remember you are traveling so gas, food and necessities will have to be paid before u start making good finds
These are just the basics there are more it is not easy but yes it can be done.