Benno,
Not sure what DSLR you had before or what you want as a replacement. You obviously want another DSLR, so get another one. Till you buy a decent scanner($100) and 10 rolls of film with processing($200) you will have spent more than what a Nikon D70 or similar would cost you. I just bought one for $150. May not be your dream DSLR, but it will give you good digital capabilities and work as a stop gap till you get more money. If you are into the Strobist thing, you will quickly burn up more film than the price of cheap DSLR.
Example, for your Strobist shoot, you will need a minimum of 4 rolls of Fuji Superia or Kodak Portra, so at about $10+-, that is $40. C-41 processing at a pro lab, cut and sleeve only, runs about $10 a roll. If you want proofs or contacts add another $10 per roll. Even a decent 1-hour lab will cost you $15 per roll with a set of prints. So your cash outlay for your Strobist shoot will cost you a minimum of $80, up to $120. And that is without scans. Most pro labs charge about $12 per roll for scanning to 2Mb+- files, and 1-hr labs are about $5 a roll. So you could easily outlay $200 just for this one shoot. That is $50 more than a cheap DSLR. So even if you have to eat only bread rolls for a week or two, a DSLR will quickly pay for itself in your situation.
In my case, my Nikon D70 paid for itself twice in the first shoot. I was to shoot a 40th birthday party, lit only by candles. So the film would have been TMax 3200 and Fuji Press 1600 pushed to 3200. I would have bought 10 rolls for the event and $13 a roll plus processing, the D70 was paid for in 5 hours of shooting.
As for digital being dead, I use digital very sparingly. In fact, I only use my D70 for events. I always prefer to use film for everything else. A lot less work and the quality exceeds any DLSR until you spend the equivalent of a small car.
That is my advice, for whatever it is worth...
