need help with new ARK mod idea

oh the grinding on rails to start with not necessarily needing the rollerblades… my idea would be to put rails everywhere or have the player build them n maybe put the buildings in too… really those buildings should be easy ? just models ? i have not modded ARK so idk how to put models in yet but i assume it is easy that part. The grinding on rails i think would be tricky cos i dont know how to make flowgraphs for that or bps. Maybe someone could give me some help with those ? this would be made all for free anyways and just for fun