@Jackson Malace
Great time to be selling homes in Central, OR. I imagine business has been decent this year.
I often tell my clients that it's really a question of opportunity cost. When you spend time creating relevant content, it's quite an investment. If you're truly passionate and plan to keep it up, then it's worth the cost. If you are just trying to increase traffic and get people on the phone, then there are other routes.
1. This is a question of the quality you provide. You would be better with 1 a month that will definitely be shared and read than 3 a week that may lie dormant. The keywords are helpful, yes. Backlinks are way more helpful. Writing good content takes a lot of time and effort. Also, people trying to sell something start at a bit of a disadvantage, because sophisticated readers can see through the content. The best content starts from a place of providing organic value to people, whether or not they plan to buy something (like a house in Bend).
2. Similar comment, although this is lower investment. One thing I like about social is that it allows you to use other content to start a conversation. For instance, if you know a writer that specializes in outdoor activities in Bend, why not post their items? You're helping them, it has much lower investment from you, you likely get the quality push (assuming the writer is decent). For homebuilding Facebook seems like the right platform, but I would definitely consider LinkedIn as well. That is where I do most of my lead generation.
3. Always, and you should have specific ones that you target. You'll also want to target items that are lower on the popularity level. Becoming #1 for 'homebuilding' is nearly impossible. Becoming #1 for 'central Oregon green homes' is probably much easier. Still, same comment applies as #1. You have to lead with quality.
4. Both Youtube and Yelp are smart ideas. Unfortunately, Yelp will come primarily from your customers. Although, you can set it up with good photos. Good ratings, you will do fine. Bad ratings can really hurt you. So you want to get out ahead of the commentariat. Youtube is great for homebuilding and real estate in-general. It's a very visual medium, and people love walkthroughs. A picture is worth a 1000 words, and video is better. For busy people, Youtube is easier than writing and editing content. In this space, it's potentially more valuable.