Salem

Hey,

i noticed when im on a horse i can also enter bulildings and... even enter/exit mining buildings on it (does he jump down? and how does he get up? lol)

so since u can get up/down inside a mining building wouldnt it be possible to store a horse in a mining building? it sounds like he wont leave having concrete walls on all 4 sides..

No; the horse, being the temporary implementation that he is, will disappear whenever the map he is on unloads.