We'll create fresh WordPress site with Better RSS Feeds installed. You have 20 minutes to test the plugin after that site we'll be deleted.
You can improve the default WordPress RSS feed to include:
Add post thumnail to each post’s excerpt and full text (if enabled in WordPress configuration).
Image will be added just before text of each post in RSS feed.
Post thumbnail is also added as media:content and enclosure tag to RSS feed.
You can access RSS Feed with full content posts even when WordPress is set to RSS “Excerpt only” mode.