I am looking to purchase a commercial office condo. I would like to get an inspection to check for major issues relating to plumbing, hvac, floor, water heater, ceiling, etc. 

However, I am dubious about inspections as many inspectors seem like they don't care at all and all they do is turn the lights on and off, run the water, flush the toilet and then they want a check for $400. 

How do I find a good inspector to look at the major issues? 

Thanks

Is it a condo association? If so they tend to maintain some of these items like exterior roof etc.

Are there tenants above you and below you or is this one level and you are buying the unit?

@Joel Owens yes there is a condo association

there are tenants below, but not above, I am on the top floor

Did the seller keep any service records for the unit? What is the age of the mechanicals? They might be close to end of life use.

If so typically you try and get the seller to give a credit to replace.