Well, it is given that Brian is currently being written as so hard up at the time that he resorted to taking a bung of a few hundred to let his land be used as a dump. Yet, according to The Book of The Archers:
Dashing and ruthless, he was a gentleman farmer from a naval background and attractively wealthy. He purchased Home Farm with 1500 acres from the Bellamy Estate in 1975 and had the house converted for him to live in
[Jennifer and Brian] have a comfortable lifestyle. They were the first family in Ambridge to have their own solar-powered swimming pool. Brian has been able to buy the newest and best in farm machinery and add to his land and livestock as he felt fit. He has always expected Jennifer to play a traditional role in their marriage and never liked the idea of her working, but he has indulged her expensive hobbies. His immediate family has also benefitted from his generosity; but Brian can be patronising, which has got on everyone’s nerves, particularly Phil Archer’s—once Brian dismissively gave Phil a blank cheque to cove damage he’d done to Brookfield stock, which Phil found infuriating.