The way you do it by knowing your market inside and out.Start with the MLS because it's online and the most efficient marketplace you'll find. 

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

I.E, ceiling height for the basement, windows for emergency exits, parking etc.Monitor posts when individuals ask for recommendations provide valueJoin FB REI groups in your state, county, city whichever is available -> ask for wholesaler recommendationsKeep an eye on the BP marketplace see who is wholesaling in your area, if there aren't any, contact the ones who post most consistently ask if they know someone who knows someone in your area.Check out your county's/city's cash-buyers list, -> build a relationship -> ask for wholesaler recommendations (and possibly money)Contact active RE Agents/Property Managers in your area -> build a relationship -> ask for recommendationsThere are YouTube channels about REI DM/post comments -> ask for recommendationsCreate FB ads " I buy ugly homes in XXX area"Get comfortable with the idea you may have to invest out of your area/state.Hound the auction webpages to the individual cities/counties your interested in (not the well known auction sites)Read publications about legacy cities with high vacancy/home abandoned rates due to industrial HQ moves or what I call industrial to IT changes or the 2008 Housing Crisis ( Baltimore, MD. 

utm_source=search&utm_medium=internal&utm_campaign=books (books recommended by BPers)Simply, bone up on the areas that you need to expand knowledge in such as, Forums, Marketplace, Learn, Network, Analyze and Resources.Feast on the Podcasts, #askbp Podcasts, blogs and webinars Lastly, this site thrives on interactions and as such we encourage two way exchanges and look forward to educational, thought provoking ideas relevant to REI.

We also utilize stealth noise monitoring and wifi enabled devise detection to keep an eye out for over occupancy & noise issues like this. 

Regarding appliances, there are a few options you can consider:Buy used appliances - Check out local classified ads, thrift stores, or online marketplaces like Facebook Marketplace or Craigslist.

find a used refrigerator on craigslist or facebook marketplace or some local reuse store.

How many GURU's actually do deals in the open marketplace?

@Carolyn BirdYou can post in the Marketplace via https://www.biggerpockets.com/real-estate-listings

This I got from BP Marketplace in 2018.