...if you're going to sell your prints, I would argue that you should just get a traditional darkroom Master Printer to do them for you if you're worried about your reputation at all. A 1 meter wide or high print from a scanned 35mm negative will look terrible in my opinion (and probably yours if you hate how it looks on a screen). When I see a digital print of a 35mm negative of that size, I instantly start to gag and convulse....that's a lie, but I don't see them as a reputable or serious photographer as it is obvious they are cutting severe corners on the quality of the final print. I've seen great results from a very good digital printer at 16x20 with a medium format camera, but when I look close, I can definitely tell it's getting pixel-y. Considering you are going much larger with a much smaller negative, I can't see too much good coming out of it.
Sorry if I'm raining on your parade, but you won't get "that film look" from what you're looking to achieve through scanning. If you don't believe me, find a traditional Print Master to do a 20x24 print of one of your negatives in the darkroom then give that same negative to a digital Print Master to scan on a good scanner, edit to the look you want (send a cd with a small sample of what you want the print to look like) and compare. It would be costly in terms of time to find a good printer at a good price and it will also cost you a few hundred dollars. But do you honestly want to sell your work short?
I don't know a ton about digital imaging to print, but from scanning and editing 35mm film for years, I'm pretty sure that the caliber of sharpening on silverfast is equivalent to PS and you're not going to get a silver bullet answer or program to give you that "film look" from a digital scan, enlarged to ~36 inches.
I did a quick google search of your name and if you are the photographer doing the models, I would definitely not budge on my opinion. That look lends well to grain, not pixels. They seem to be shot mostly at higher ISO films and are probably pretty grainy for the most part and thus, enlarge poorly digitally. You might be able to get away with it had they been Velvia 50 slide negatives, scanned a drum scanner. The only thing I can imagine that would save you, if you still choose to go digital is that the viewer would have to stand back about 12 feet to look at your photograph of 1 meter and from that distance, they might not notice. But as am emerging artist taking (in my opinion), great and unique modelling photographs, don't sell yourself short. You can always sell your photographs for more to offset the cost. For prints that large, people won't bawk over an extra $200 to cover the printing charge. People who buy prints that large want a centre-piece and want the highest quality available.
I know you asked for tips and not opinions, facts and not personal taste, but I thought I might save you some agony, from someone who also tried to take the cheapest route once by getting 35mm scans enlarged, and regretted it immensely.