However, the original poster was simply asking about the best way to go about getting a policy set up for a very specific task.

In many cases, they’ve even negotiated my full fee despite my limited involvement.

A few colleagues have had clients audited for these studies now and they've been disallowed every time so far. 

If not, then I'd explore a line of credit, but that will also be a full doc qualification and you'd still have that variable interest rate.

Day 4: The Heart of the House – HVAC, Electrical & PlumbingNow that the house is solid, it’s time to get the essential systems up and running—aka the stuff that makes it livable.

I've been to their meeting 2 times already.

I recently attended a webinar, Master your Rentals: Save Money and Time with effective Self-management.  

How well do they take responsibility and execute on tasks?

However, if your client is a full-time W-2 employee, they may not qualify for REPS making it easier to benefit from the cost segregation study on the STRs.Real Estate Professional StatusReal Estate Professional Status

When reaching out, it helps to offer value in return—think about tasks like checking on properties when they can't, delivering materials, finding reliable contractors, or even handling basic project management tasks.Building genuine relationships and showing you're willing to contribute will go a long way in earning their trust and gaining hands-on experience.