Be great to your advice from seasoned MHP investors who've done skip tracing and had luck get accurate data.  

Yellow Letters3) Skip trace and cold call your return to senders mailings. 4) Meet with as many sellers as you possibly can.

Well, I skipped to the last page here.

The answer to the basis of your question everyone seems to have skipped, is no.

I've been licensed for 10 years and if you're looking for minimal brokerage fees for investment purposes for yourself, you'll want to skip the expensive branding like the Coldwell/Century 21/ReMax and go for the slimmed down version like a smaller boutique brokerage or a flat fee one like Charles Rutenberg Realty that offers 100% commission.  

I hope you did not skip meals for two years. :)

Anytime I skip these steps, I regret it.

Most of my friends and clients skip on the balloons.

Don't be a moron and skip out on basics, but you get the idea. 

If the plan is to buy multiple properties, turn them into rentals, and create a job for yourself, skip the professional manager (and the cleaner and the contractor for minor fixes).