FYI, I have built a couple of On30 passenger cars plus one or two freight cars, but never locomotives, by utilizing parts from the On30 kitbash section. Bachmann was selling passenger car bodies, frames and roofs for reasonable prices. I was able to put together two passenger cars - minus trucks and couplers - for less than $30 dollars each. After I added Bachmann cast trucks and Kadee couplers, my cost was still less than $50 each. At the time, I had posted on this forum but its been a while now. Right now, I think they only have a couple of car bodies listed in the kitbash section. Hope this helps.
. The Kissimmee Valley Extension of the FEC started in New Smyrna Beach and ended in Okeechobee. The plan was for this to be a mainly agricultural railroad with light passenger service. In my reality, around the time the line was abandoned in 1947, a group of the ranchers and farmers got together and purchased a portion of the right of way (from Holopaw to Okeechobee) and formed their own railroad to get their goods to market. Although trucks were making inroads into the freight-hauling business, road infrastructure was still lacking and unreliable.