Without a doubt, mobile applications make sense. But the amount of time you would put into this at this fledgling stage of the business would be a big mistake - one should first focus on the web based part of things, iterate till it matches the needs perfectly, then make a simple mobile app and expand from there.
Trying to make some large mobile app would bog down the business, and it will not pay.
The misconception there is that a mobile app need be large, or indeed that we are (or intend to) plough effort into one while we still have more important things to do.
But that doesn't stop us planning, theorizing and experimenting. How else is innovation manifested? :-)
Trying to make some large mobile app would bog down the business, and it will not pay.