If the price is right and the equipment looks good I would go for it. Not sure if I would use second hand drawn foundation but soaking the wood wear in a bleach solution and airing everything out would be enough for me. Rebuilding frames can be labor intensive and might not be worth the work, it's definitely not my favorite job as a hobby bee keeper but my time is free and frames aren't, in a bigger operation it might not be cost effective. Sounds like a interesting venture, let us know how it works out.