Despite multiple requests (and promises to do so in text messages) across the span of months, my partner never uploaded the relevant information on this client, including the invoices.

You can report the illegal listing to Streeteasy/Zillow if it was on there by filling out their form at https://support.streeteasy.com/hc/en-us/requests/new.

I lost one once that projected great return because i requested an estoppel before accepting the offer.  

Focus on growing your business profile to transition away from this.Documentation: Lenders often request detailed financials and tax returns.

Right now the majority of viewing requests I am getting are from potential tenants that have credit issues and eviction filings.   

We do have some landlords request listings on there, but very rarely.

Tenant and Lease ManagementSimplify tenant payment workflows, digitize receipts, and efficiently manage leases, rent collection, and maintenance requests, etc.5.

It's good to hear others are having success, but I would check if it works in your area before you spend the $150.I don't know if this would apply to you, but some folks think that FF works similarly to AirBnB or Vrbo where they will push resident requests to you.  

For the most Service has been responsive, they're adding more functionality, though wish I could track maintenance/repair requests and service fees for rent, but the cash management is what's keeping me here for now.

Firstly, well done for persevering and trying every avenue you thought would get you the data you needed.Most would have caved earlier and handed out there hard earned cash for old, saturated leads/records from the same prominent platforms which dump them pretty much when they receive them from either 1).the same large brokers AFTER the county has listed them on the county website or, 2). from the counties themselves directly AFTER the county has listed them on there own website, or, 3). from data scrapers on Upwork/Fiverr who scrape the data from those same platforms AFTER the counties/brokers sell those platforms the data being scraped by the freelancers.Anyway, rant aside you seem to of made the same mistake i made when I first started branching out away from providing leads to my original couple of clients i got from Upwork who wanted me to scrape data from court records in FL for pre FC leads.Simply, I didn't know where to look for the information I needed in states outside of FL.FL only allows the judicial route to foreclosure so I only needed to know/find/scrape the data from Lis Pendens documents for counties they requested.