Either be active in management or hire a reputable PM who can satisfy this role.

@Oli HarpsTo manage your Oakland 4-plex effectively, stay informed about the local market, build local connections, conduct thorough tenant screening, consider value-add opportunities, decide whether to self-manage or hire a property management company, network with local investors, plan for growth through scaling your portfolio, explore financing options, and stay informed about the local market through online communities and resources.

So far I have seen 2-2.5% the only 0% was from a small local commercial brokerage who always had a reputation to lowball buyers agents so most agents just never send out their deals. 

Any recommendations on a reputable company to do the testing?

Check the in person events and meetups in your local area, our online community is full of knowledge and folks willing to share and still nothing replaces the opportunity to interact IRL, you never know who you will meet and where that can take you on your REI journey.

Check out other online guides available here: https://www.biggerpockets.com/guides3.

Network: Local meetups or online groups (like BiggerPockets)Check out financing options: traditional, creative, or raise capital.Look at properties in your area to understand the market.Let's connect!

Given my tech and data background, I'm considering developing an online app specifically for Canadian investors.I'm envisioning an interactive dashboard that integrates economic data, sales figures, bylaws, and rental information, complete with prediction models.

Check out other online guides available here: https://www.biggerpockets.com/guides3.

Also, connect with other like-minded people in your community and attend as many in person (and online) meetings at your local REIA groups to network and connect + find out about off market deals and get on local wholesalers "buyers lists".Best of luck!