I posted this in the Troubleshooting forum, but was directed here since the conflict seems to be with a mod. Here is the original thread:

http://www.gamesas.com/topic/1480363-hearthfire-windstad-manor-invisible/

After googling, I came across three mods that were listed as possible culprits that I had installed. Unofficial DG Patch, Distant Detail, and Full LOOD: Morthal Swamps.

I disabled these mods and was able to continue building, but I can find no solution to fixing what was already done. Here are the facts:

No prior saves

Already built "small home" at Windstad, but it's invisible/nonexistant

Lakeview manor fully built and furnished.

I have a LOT of mods, so posting my load order isn't ideal. I've used BOSS and have been as careful as possible to get everything in the correct order. Suffice to say, of the three mods I have listed, Hearthfire is first, Unofficial HF Patch next, then Full LOD: Morthal, and Disant Detail bringing up the rear.

May main concern is the fish hatchery. As long as it works I don't really need the dwelling. The hatchery is just a short walk from Morthal as it is, and I already have Lakeview Manor completed. But if there is any way to fix with without having to start all over (not happening), I would be grateful. Thanks in advance!

First things first, never and I mean NEVER (not shouting, just emphasizing this very important point) disable Unofficial patches. If you do not have a prior save, then say bye bye to this playthrough.

Second, Dawnguard should come before Hearthfire, so is its Unofficial patch, therefore the conflict should not happen.

I really don't think how LOD would have problem with those houses, thought, but I'm not sure.