I use a Replicator 2
To be Honest I have seen Wanho duplcator I3 that are Cheap and as good as my Replicator.
If I had to replace mine an Ulimaker 2+ looks Good. It depends what you want.
Most of the cheap ones that work go down to 0.1mm layer height.
The Ultimaker 2+ has changeable nozzles and can go down to about 0,03mm. However at this speed its a lot slower and probably not worth it for terrain. Its only really worth it for very small items (i have seen windscreen wipers for 12/32 card as a good use) and at a guess 1/144 figures which I do.
The Ulimaker 3 is even better and is optimized for 2 head printing but its a lot more expensive and is really useful only if you are into soluble support material.
I only print in PLA so vent systems are not an issue for me.
Can't speak for resin printers I don't want resin in the house.
If you look at most Kick starters for terrain they are designed to be used with relatively Cheap printers.
Whatever you get look into paying for Simplify 3D it makes a massive difference in performance and speed to getting supports in.
Look at some of my threads there are pictures of what the replicator can do.