Free: Contests & Raffles.
What percentage of the use time would you expect it to be towing the horse/hay vs other weekend use? If just casual tow, maybe gas; if majority tow, I'd look more towards the diesel.
Marry her before buying a truck to pull her horse trailer
Own a 3/4 GMC HD gasser and have never been disappointed in my decision. Have had zero problems in last 10 years and tow loads varying between 2k to 8k. I could put my 8.5' camper in bed and tow my 23' glass boat with no issues. What has been said about putting weight in back and ride quality are very true, I will often through my quad in back of truck just to help it ride better lol.