I would say, on very rough pricing from them, you are looking at rough estimate of $10k - $15k for ESA (Phase I environmental site assessment), PCA and Zoning and ALTA survey reports. 

Phase 1 Environmental Site Assessment (ESA)2.

Inspections will include not just a physical inspection of the property, but also engineering assessments; environmental assessments; zoning and permit inspections; leases and service contracts and finances (3-5 years, preferable prepared by an accountant).   

You can limit inspections in your offer to catastrophic plumbing, electric, foundation, structural or environmental issues.

Have you checked with the local building dept (it’s usually in their website as well)-park impact fees-traffic impact fees-school impact fees-per unit charge for sewer/storm-check if you have room onsite to meet the required parking ratios (1.85-2 spots per unit is required out here)-check your phase one environmental as see if you’ll run into any issues on the property by expanding the footprint.Hopefully your building in an area that welcomes new development and most of these don’t apply.Best of luck to you.

If you are staying in the footprint of the existing structure you can do it much quicker.

Further, broker selling the property want 6% commission, the buyer wants you to make needed repairs, pay for a survey, pay for title insurance, pay for an environmental report.

@Brenden Mitchum No I was referring to parking garages for the public to use, that are robotic, whereby they are stacked and make use of a smaller footprint, but for more cars.

I've done a few deals on my own in the past (just SFR flips with my own cash), but am curious about looking into some HMLs in Denver to expand my footprint.

This doesn't mean that you are Financially Independent at this point - you still need to keep going, but maybe your financial footprint is small enough that you can do some side jobs or temp jobs here and there.