We were looking at options to stay close to Horncastle and found quite a few that looked OK but were either over-priced or nor dog friendly. Edlington Hall Cottage worked out at around £60 per night, great value for me the wife, two teenagers and a dog.
The cottage looked like it had been recently refurb'd and was extremely clean and well maintained. The owners were really helpful with anything we needed and were always available if needed.
The location is ideal, on the edge a lovely peaceful village but less than 10 minutes drive into Horncastle where you can get a meal, a pint and all the daily essentials.
One thing to bear in mind, the property doesn't have wifi and the mobile signal is marginal, although many visitors may regard this as a plus point :).More