Besides using the built-in free listing to Zillow, Realtor.com, I also post the listing on Facebook Marketplace. 

If you're property is listed on Zillow, FB Marketplace etc., you should be getting enough volume of leads if the price is even somewhat attractive.

I would highly recommend FB marketplace and also joining local FB real estate, rental, and leasing groups. 

Facebook marketplace for all the furniture is a move too.

We feel very confident in our underwriting, but given the jump that we made from SFH to an apartment building, we want to ensure we're not missing steps in our DD/inspection plan.Here's our current plan:1) Have a general inspector complete a Property Condition Assessment.2) Have specialists complete an evaluation of the roof, electrical, foundation, and heat source (2 steam boilers).3) Review financials, all leases, existing service contracts, rent roll, tax assessment, rental certificate, and 12 months of work orders.Here's what I'm not sure about:1) Are there DD items (specifically those that we would request from the seller) that are not captured within #3 above that we should be requesting?

Meetup.com is a good resource for those but some of the groups will also post here on Bigger Pockets Marketplace too.

Have you tried asking the homeowners to invite their kids to the meeting where you assess the home's value?

If you are still not finding what you are looking for, you may have to begin researching how to find off-market deals.Don’t forget that BP has its own marketplace where you just might find what you’re looking for. 

  - Lastly, does anyone have any spreadsheets, calculators, or other tools for quickly assessing the feasibility of potential investments?

Being the most secure approach is an inaccurate assessment and way more goes into it.