the for more money part was just them doing their job for the owner and themselves assuming they work on a commission. that being said id pass on letting em go through in this case. you did your good dead for years and your grateful neighbor did the right thing to try and get you the farm. i think i'd just say no thank you but if you want youre willing to rent it in the future. 

i know its rude, but id be tired of someone using your generosity in a manner that only helps them and never helps you. i don't see that you have anything to loose. theres other farms out there even if they don't touch you.