have verizon cell phones and a hot spot. do not live at my shop and no one does either so no internet available to help. 

i have tried two of the not the cheapest, but definitely not the most expensive signal extenders/boosters for my shop. it helps at times and then at other times its like i don't have it. 

i have a 60x96' shop and spend the majority of the time in one end of it. i would be ok if i only got great service in that 1/2. it has metal inside roof but not skinned on the inside also. only one small window. i have a T post outside the shop and the outside antenna bolted to that. do i need to possibly mount it at the top of the building? i'd be willing to purchase a different or more expensive one if it was guaranteed. 

I'd like to be able to talk on my cell and use the internet on my cell and also take our Verizon wifi hot spot there to run wifi on a computer and if possibly a TV roku box to entertain the young ones while i'm working if thats all possible.