I'd still detect. Trips in an RV to old parks in small towns. Taking vacations to hit the beaches in exotic resort areas, but those exotic trips would be the exception and not the rule. I'd be more happy in an RV driving to small towns and hitting old schools and parks. I could live very low cost doing that for the rest of my life.
I'd also combine business with pleasure by buying old houses, re-habbing them, and then selling them for a profit. Of course I'd be buying those houses based on the potential in metal detecting the property as well. I wouldn't have people "plant" items for me. That seems rather dumb and takes the thrill out of it. That's why I never cared for those seeded hunts, or fishing stocked ponds.
I wouldn't own a bunch of machines. If you own several you never really get to know one well enough to do well with it. I've tried many of them over the years and I'd own the machine I own now for land hunting as I've owned enough to know what has the best performance I seek for deep coins and gold rings. I would, though, buy a water unit so I didn't have to risk wading anymore with my GT now. Probably an Excal with a 10" coil, 12x10, or S-12. But I'd probably also pick up a AT Pro for water hunting with a different animal when the mood strikes me, and also as my backup land unit for when it's raining or I wanted to use a machine I could swing fast with. I would buy a few more coils for my land machine, though. A WOT, S-12, and a few others...To test against my 12x10 to see which is deepest in my soil. Sure, I've read enough comparisons to buy the 12x10, but doing my own depth tests and such would allow me to confirm or disprove things once and for all.
One thing I wouldn't do is buy a big house. That's just more space you have to heat, clean, and buy furniture for. A small ranch in a quiet neighborhood like I'm at now is all I'd want. Would like to own some hunting land with a small cabin somewhere remote, though, to get away to. Not into expensive toys. Not into fancy parties or restraunts. Don't want any expensive art on my walls when something cheap looks just as good.
I'd help a few friends out. What I wouldn't do is what my own sister and brother did to the rest of us. They came into a large amount of money that we always said would be split among us when it happened. They took it and ran. I don't talk to either of them anymore. I'd sooner help a good friend than either one of them, especially since they know me and my other sister are in dire straights at the moment.