Which is true. I think it's been discuss that 60-70% capital over your deposit is the likely max, even if you put 100k in your max loan is 233k so your looking at a max total of 333k.the only problem with buying a yard and renting ground is having the opportunities to expand
If your up for it start small a field with a shed is as small as you can go see what you can find then work out setup costs, then look to see if you can go bigger, the cost of renting land in is less than mortgage costs for the same land.
My choice would be go for bare land that has potential to have a farm started on it, don't borrow anything to get the land. the rules for planning permissions, are more relaxed around farms and farm houses, it may mean a good amount of time in a caravan but it's not impossible. If you go this way look for land where it's not going to break the bank to get water and power to site and you have asses that councils approve, this needs a good line of sight in both directions I think at least 25m in both directions, and its not on a bend.
Make sure the land isn't all sloping as this makes things more expensive.
The small route will require you have a job or income as the farm is unlikely to provide you one for a few years. If you get it up and running carvan on site basic water and electric, get your livestock business up and running apply for planning for a farm house. If they pass it which will take years, you have 2 options build the house and max out. Or sell it with planning at which point the added value increase your nest egg and you move on, if you max out and build if you can scrape the money together, you will max your return, if you sell up at this point you can restart somewhere else with a large increase in starting capital.
Either way this gives you an in, And a good start even if you just keep it.
Converting bare land into a small holding is the cheapest in with max return but will also see you living in a carvan while you fight for planning.
And having to have a job while building up your livestock business, getting planning for a house on an arable business is nearly imposable.
The risk in starting small with no borrowings will mean far less stress, you will enjoy it far more. If you have a job that's paying the bills you can roll profits for your livestock into expanding that side, the council will need to see its a business not a hobby.
The perfect plot of land would have land to rent next to it....or connecting to it. In truth you could start on as little as 5 acres. If you could rent 50 near it. Don't forget you will need to know if the council will allow you to build sheds on the land you are thinking of buying at the very least, a friendly chat with them should tell you what your chances are.
Good luck.