I've been having the same urges, and I will eventually succumb. Here's why:
If you're going to use vintage gear, it makes much more sense to specialize for the purposes you have in mind. I have slowly acquired a fairly comprehensive vintage L39 Leica kit, and I use it for general shooting, candids, architectural, and "street" images. But I don't force the issue by using it for long telephoto shots or extreme wide angle images. My Leica range is 28 to 135mm exclusively, which is its natural strength.
By the same standards, I have other old outfits for particular purposes or styles - full Hasselbad rig, Super Ikonta, Rolleiflex, and 35mm SLR outfits in Pentax and Rollei SL35 form. They are fun to use.
The old Nikon F series were the most capable lines in the 35mm realm for decades (although Canon users can also make a fair case) and are real beasts in the durability area. Available lenses include everything from the PC to macro, and all are of top optical and mechanical quality. You can do almost anything that a modern DSLR will do, and they are at bargain prices.
I think I've talked myself into it now. Go slow, get the stuff you'll use most first, but don't pass by an unusual bargain when you find one. In a couple of years, you won't be able to do it at twice the price. Look at what's happened to prices of Hasselblads, Pentax 6x7, Mamiya 7, and other lines that have seen dramatic increases as the younger generations rediscovering film fall in love all over again. The price is right because so many were made, but when the supply dwindles, they'll be out of the range for many of us.
Just wait till I get the best bargains before you start acquiring!
Andy