@Rich Hupper, I have seen a number of the types of building you are describing used for smaller subs in the Midwest. the type of construction they have utilized is a steel pole barn style of building, which have come a long way aesthetically and can look pretty contemporary if that's the desired appearance. From my interaction with the developers of these spaces they are relatively affordable to build and are fulfilling the needs of their tenants.
A couple things to keep in mind:
-How are the leases to be structured?
-What are the needs of the specific tenants you are chasing? Different trades have unique needs for their equipment, lifts, power, fire protection, hoods, ventilation, etc.
- Permitting in your jurisdiction, most jurisdictions I have worked in require an architects stamp for commercial work, in general its the unknown unknowns that can come up with people trying to do these types of projects on their own (and the associated liability should something avoidable occur in a building) that the cities are trying to avoid.
-Cost of sorting things out on paper vs. in the field, Having a complete design (since you are new to the GC side of things) will save you a lot of headache during the entitlements phase of the project, and change orders once the build starts. Its a heck of a lot cheaper to relocate a wall in a drawing than it is in the field.
-Marketing, part of your architects services can typically include renderings for marketing.
TLDR - Architect provides more than just drawings (though they are the primary deliverable) and are likely required for commercial work in your state, having the design sorted out before starting construction is almost always the cheapest way to build, tenants have specific needs - build out the space to work with them while being flexible enough for the next tenant.
In my experience, the single most effective way to mitigate cost during the construction process is to have as much figured out as possible by the time you break ground. There are a lot of ways to scrimp and scrape off a couple bucks from the front end of projects but this generally leads to making that up on the back end when unaccounted for items come back into play.
Good Luck!