Sam, in all honesty, i'd steer well clear, however tempting, of any commercial property at the moment, you can't give them away! As an example, my wifes uncle had a shop in Leicester near the Racecourse, prime location for a furniture shop... read exclusive. 6 years ago. it was valued at over 600k give or take, the property then sold for 240kish one year ago, the buyer has just resold the property, and took a 20k hit on it! he thought he was being smart! Now the property is being converted into a home
I'm all for enterprise, but sadly now is not the time, commercial properties have NO value at the moment, only what someone is willing to pay.
Hold tight for a couple of years, get a mortgage, and rip through a project that you can both handle, given the help that you have around you, sell it and move on to something bigger and better, do this 4 or 5 times over the next 10 years, and you'll be sitting pretty!
Thom