Your most likely cheapest system would be to use a surge brake hitch coupler with a 1-5/16" ball socket. Likely it will be rated for 10,000 or more lbs. There is an electric brake hydraulic pump unit available, but I believe it requires a battery on the trailer, and it is much more expensive than the surge brake coupler. Generally the surge brake couplers are quite reliable and low maintenance.
Paul in MN