It really depends on how long you plan on leaving them alone. They don’t mind being inside dogs but they do need a good bit of exercise. So, if you’re gone at work all day they should do pretty good as long as you give them plenty of exercise and attent
Borders really love being around their people. Personally, I could not recommend a Border Terrier for a family that needs to leave their dog alone most of the day. It's a great breed, but like any other, there is a question of fit with the family's lifestyle.
My boxer and border terrier adore each other and really love each others company when I have to be away from the house.. they can play for hours and then nap together.. I recommend a companion.. in my opinion 2 dogs are MUCH easier than just 1!