This is interesting, right? Because your target audience may not necessarily be part of this tech wave and are on Amazon ordering stuff. These groups of people are "old school" in their purchase personality. They probably look into catalogs, read the mail that they receive, etc.

I would recommend:
1. Doing product placement in your local golf, hunting, fishing stores. Maybe do a 50% split with them.
2. Using mailers to send out. USPS has the option of you sending them brochures and they would drop it off in peoples' mailboxes - you get to choose the radius, etc.
3. The older demographic (elderly retired men) actually use FB the most as a social media platform. I would do a geo-targeted ad campaign on Facebook with the age range of >50 | Hobbies include: fishing, hunting, golfing. You can even add a criteria in Facebook ads to include peoples' interest in shows/movies/etc. I'm sure there are fishing shows that people watch so you can include that too. Then spend $100 a week on ads and A/B test them.
4. Partner up with local real estate agents somehow and see if you can work out some cross-marketing strategy - would be interesting to see.