Nacho/ Michael-I've historically done something similar to what you mentioned. In particular, evaluate market rent based on comps and compare it to gross sales as a percentage for rent.
Nstanbru-No, it is owner occupied.
Guys, I haven't told the whole story and with my worries of confidentiality, I am a little hesitant to say much more. But, I am in receipt of the gross sales, and they don't support project costs based on rents determined from typical sales percentages. It is a quite unique property, and the business has a higher margin than say, an Arbys. I am mainly trying to add support to my valuation approaches since there isn't a lot of great data on like-kind properties. I have support for, say, a 7-8% of gross sales percentage on rents, but I didn't want to blindly go higher without support.
Just realized that I put this in the review forum-apologies.