Fixed gear kind of mountain bike

Leader Pharaoh is too expensive or not, BB too high or low, probably not compatible with BMX cranks or is, doesn't have both disc brakes and canti break mounts and caliper brakes in case OP gets bored, dropouts are not pretty enough or are too ugly or not totally horizontal, and will most likely require an infinitesimal amount of research and/or work, which the OP does not seem to keen on doing.

Thanks a lot but I let the FGFS option go as it is not a good geometry to ride it on a distance. Thanks a lot though!