Your clients aren't going mobile. They went mobile years ago. More than half the searches on Google are now done from a phone. If your site isn't mobile friendly, you're losing business. Really. One of Google's page rank signals is mobile. Your site WILL be ranked lower if it's not mobile friendly.
All AttyHub sites are mobile and work great on tablets and phones - and, of course, on desktops and laptops too. Again, we think it's so essential that mobile friendly is included at no extra charge.