I take it you mean the Scottish Borders. Hello, the from another Borderer. Whereabouts in the Borders?
I think it will be difficult to get grants of your holding is only 4 acres, as you probably will have to register as a business/farm? We have 9 acres + rented land and cannot get any farm payments or similar. But lots of webtrawling may be useful, and looking through some of the EU funding initiatives, maybe under LEADER?
For more local possibilities contact the ranger service from the council, they might have a idea.