There are 2 farms in Finchdean which is the other side of the A3 to Clanfield New Barn Farm and Myrtle Farm I think they do DIY you could try them I beleive the hacking is quite good.
looked at new barn which is lovely but really looking for somewhere with a floodlit school as i work 9-5 so in the winter would only be able to ride at weekends.
any idea where myrtle farm is? heard of it a couple of times.