One of the things I’ve tried to do in recent years is to recapture and harvest yeast from the beers I’ve been brewing. Even one pack of dried yeast is $6 bucks! If you go with some of the specialty yeasts (liquid/what not) you are looking at $12 to $15 a package. With 9 brewing sessions this year, that would add up to about $100. I’ve worked really hard on capturing and storing the yeasts I use the most often. Here’s a picture of those in my beer fridge:

You’ll see I have one vial of “Brettanomyces Bruxellensis” from White Labs. The rest of the vials are all recaptures. I’ve got WLP 550, WLP 565, Hornindal Kveik, a few misc Orval (Brett Bs). I still have some dry yeasts packets as well.
Knock on wood, so far I’ve had great luck by re-pitching a starter (2 cups water, 1/2 cup DME) about 2 to 3 days ahead of brew day. I usually check my yeast health and do some random cell counting.

If it’s a big brew, I’ll do a bigger starter. I have a couple of 1 liter, a 2 liter, and a 5 liter flask if I need them! I had built a laminar flow hood, but I “gifted” it to a local brewery while I was living in Tucson (hopefully they are still using it). I would like to do some yeast culturing, so I’m probably going to have to build a new one — I’d like to build a smaller version — I’ll just have to figure out the noise reduction/venting issues in my “brewery.”
One of my goals over the next couple of years is to try and capture a local yeast (from one of the many fruit orchards near here) and see if I can make a passable beer from all British Columbia ingredients. The Gambrinus Malt house is about an hour north of me. I can get locally grown hops — I just need the yeast! I’ll keep my fingers crossed that I can capture some and it doesn’t smell like dirty socks. Stay tuned for more of this adventure!
Beer Mentor