Hi Emil
if I'd have a lot of money to spend and absolutely no idea on how spend them, then I would first ask myself if I do really need to spend them
besides, how about studio stuff and studio props? I see often in your pictures "vintage-like" props. You could spend some of the money to buy items you will use in your compositions (as props or for still life, etc). Of course you won't need to spend all that money on such items. You may want to buy a gift to your fiancee... How about some dress or fine lingerie? (no joking, I'm serious - plus, you could portrait her dressed with your gift
).
Finally, you could spend the remaining on anything that could improve/inspire your photographic skills. Maybe a print from Saudek is way too expensive, yet tempting. But you can always add more (expensive) art books from Saudek and others to your library. And since you're interested a lot in alternative photography and ancient printing tecniques, there's a lot of related material that money can buy: books, tools, raw chemicals (especially the expensive ones, e.g. those required for platinum/palladium, gold toner, etc.)... I don't know if you use digital negatives for big prints... If not you might want to give it a try and buy the required equipment.
A trip for a photographic workshop organized by another master sounds very cool. I'd definitively approve the choice. In fact, that will probably be my next investment. I'm actually working a lot and saving all money is possible to come in Denmark at the beginning of the next course at Vraa Hojskole!
Will write soon a private message about this idea.
Best,
Fulvio