On the wholesaling front, finding deals is a great skill to have but as others have said, you really need a marketing engine to keep it moving Which also requires capital

I engaged an environmental engineer for a preliminary report, and found the contamination much more limited than feared.  

You should talk to the Planning Dept and gauge their thoughts on the viability of doing it, and also a local engineer who helps with entitlement.

For example, an engineered cost segregation study is a very in depth study that includes an onsite visit and the engineers look at the blueprints of your property and typically results in the most tax benefits.

For smaller-to-medium size deals, the more savvy buyers will have a conceptual site plan done by an architect/engineer and will have what we call out here a "pre app" meeting with Planning at the city, to see if there are any initial comments and feedback from Planning (or other city departments) if there are any constraints they see from the out-set that could put downward pressure on the ultimate unit count yield. 

He also severed a roof joist to make way for a sewer vent pipe, which will now require repair (I believe that I will need a structural engineer to sign off on a mitigation plan). 

In today’s environment, a lot of investors are pairing flips as the capital engine with smaller, lower-basis rentals like you mentioned so they can keep velocity without over-allocating cash.

Professionally, I’m a civil and environmental engineer and work as an engineering consultant.

I have used costsegregation-guys for this, and their engineered report provided the clear documentation my CPA needed to file the catch-up deduction accurately....

It's mind blowing for me now seeing my early prompts and how I've molded AI to use as a tool that used in so many of my workflows now.Happy Engineering!