Contrary to what the author and others have written, I would discourage wiring with single mode (SM). For ethernet the cost of modules and patches might not see

Contrary to what the author and others have written, I would discourage wiring with single mode (SM). For ethernet the cost of modules and patches might not seem so significant, but structured fiber can be used for things other than ethernet, for which SM is vastly more expensive than multimode (MM). Think 4k display port for cinema/follow-me TV, although that is being replaced with SDVoE for 4k@60. However, you do want to use higher quality OM3 or OM4 MM cable (aqua or violet sheath). If required you can carry SM origin signals over OM3/4 by using a mode conditioning patch cable. In terms of pulling, a lubed cable sock can get through lots of places, and save a ton on termination. Cablers often use a strip of yellow tongue (the nylon tongue on chipboard flooring panels) to poke through a run, and then run a conduit or pull cord. Pre terminated MPO/MPT (which is 12 core) and MPT breakout fans are very cheap in comparison to splicing. It's generally much cheaper to run more fiber than it is to run conduit so you can run more fiber.