They have a ton of good groups and meet up events happening on both sites.

This keeps them motivated.Clear Contracts: Make sure your contracts have deadlines and penalties for delays.Regular Check-Ins: Visit the site often to catch issues early and keep things on track.Scaling UpMultiple Contractors: Work with more than one contractor to avoid delays.

If one or more units are vacant, the remaining units often don’t provide enough cash flow to cover expenses, making it harder to meet operating costs.Maintenance costs: A fourplex comes with four times the appliances, plumbing, HVAC systems, and other components to maintain, leading to significantly higher repair and maintenance expenses than single-family homes.If you want to see the detailed calculation, read this BP blog - More Units Doesn’t Mean More Money—Why a Single-Family Home Can Beat a Fourplex.Resale value: Multi-family properties have a limited buyer pool—mainly investors—who base their offers on CAP rates.

I'll take any and all advice any of you have, but the two things I'm looking for specifically are: what sites, services, and/or software you use and recommend for sceening and managing tenants? 

Here are a few suggestions on how you can maximize the wealth of information available: Check out the blogs and podcasts, or take advantage of the search feature (magnifying glass).

I don't see it on the Oregon Real Estate site: https://www.oregon.gov/rea/licensing/Pages/licensing.aspx 

For insider tips, check out blog posts by local favorite Bobby Vegas, who shares all the best spots, including the Rainbow Club and Emerald Island casinos.——————————————————————————————————🎄 Enchant Christmas Returns to Las Vegas!

Here are a few suggestions on how you can maximize the wealth of information available: Check out the blogs and podcasts, or take advantage of the search feature (magnifying glass).

is there a tool on this site? 

I used a LOC to build a 12 site RV park in a small town, opened it up and 1.5 mnths later, I'm full occupancy and servicing the debt (some of it at 8.75%) & cash flowing.