You will be ok........25ft is no biggie. The tech will want to put the dish closer...... on the building.
If you just want it 25ft out you will be looking at digging in as many a four cables + the pole & concrete. Pole mounts are ez to service but get dinged more often.
Well the idea is you need just two lines now so a single two line cable (dual rg6 with ground) will do.
IF you ever need or want another receiver or a recorder you will have to dig in another line (or two) at that time. Since you are digging anyhow, putting in the four now is a consideration.
The pole in the bucket will not be enough for the weight and wind load of the Ka/Ku dish.