Hi
8 Acres is still classed as a small parcel,which bumps the price up straight away,whether steep slopes or not, the horse fraternity will come a sniffing, with their bottomless pits!
You really need to look into the deeds of the land,is the land registered and is the present owner also selling the entitle deeds so that you can claim for single farm payments.(These are different to land deeds)you say there is a river, then find out who owns the banks.8 Acres is not enough land to build without full planning permission.
There will be legal fees as well all though they are normally set for buyer and seller at £500 each, but normally the seller will want you to pay his share, so that is another £1000.
Check for services running across the land, is there any Lee ways,that can be another costly mistake.
So don’t know where you are in the country, but down here in Somerset,with our heads just above the plimsoll line,most land around us is under water but still makes in access of £15,000 per acre at auction,and small parcels making above £22,000.
But as they say its all relative and god ain’t making anymore land!So time to dip your toe.
Regards
Andrew